diff --git a/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.h b/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.h
index b92bc1ec9c3209..eff3b0c5461422 100644
--- a/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.h
+++ b/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.h
@@ -5,11 +5,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#import <React/RCTEventEmitter.h>
 #import <UIKit/UIKit.h>
-#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= 12000) /* __IPHONE_12_0 */
 #import <UIKit/UIUserActivity.h>
-#endif
-#import <React/RCTEventEmitter.h>
 
 @interface RCTLinkingManager : RCTEventEmitter
 
@@ -24,11 +22,6 @@
 
 + (BOOL)application:(nonnull UIApplication *)application
     continueUserActivity:(nonnull NSUserActivity *)userActivity
-      restorationHandler:
-#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= 12000) /* __IPHONE_12_0 */
-          (nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler;
-#else
-          (nonnull void (^)(NSArray *_Nullable))restorationHandler;
-#endif
+      restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler;
 
 @end
diff --git a/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.mm b/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.mm
index cfa9078446208d..3fa06c43979bfd 100644
--- a/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.mm
+++ b/packages/react-native/Libraries/LinkingIOS/RCTLinkingManager.mm
@@ -72,14 +72,8 @@ + (BOOL)application:(UIApplication *)application
 
 + (BOOL)application:(UIApplication *)application
     continueUserActivity:(NSUserActivity *)userActivity
-      restorationHandler:
-#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= 12000) /* __IPHONE_12_0 */
-          (nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler
+      restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler
 {
-#else
-          (nonnull void (^)(NSArray *_Nullable))restorationHandler
-{
-#endif
   if ([userActivity.activityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
     NSDictionary *payload = @{@"url" : userActivity.webpageURL.absoluteString};
     [[NSNotificationCenter defaultCenter] postNotificationName:kOpenURLNotification object:self userInfo:payload];
diff --git a/packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.m b/packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.m
index 9da656c5b0fb95..cb293db64411b4 100644
--- a/packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.m
+++ b/packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.m
@@ -231,7 +231,6 @@ - (void)setSelectionStart:(NSInteger)start selectionEnd:(NSInteger)end
 
 - (void)setTextContentType:(NSString *)type
 {
-#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED)
   static dispatch_once_t onceToken;
   static NSDictionary<NSString *, NSString *> *contentTypeMap;
 
@@ -263,21 +262,14 @@ - (void)setTextContentType:(NSString *)type
       @"telephoneNumber" : UITextContentTypeTelephoneNumber,
       @"username" : UITextContentTypeUsername,
       @"password" : UITextContentTypePassword,
+      @"newPassword" : UITextContentTypeNewPassword,
+      @"oneTimeCode" : UITextContentTypeOneTimeCode,
     };
-
-    NSDictionary<NSString *, NSString *> *iOS12extras =
-        @{@"newPassword" : UITextContentTypeNewPassword, @"oneTimeCode" : UITextContentTypeOneTimeCode};
-
-    NSMutableDictionary<NSString *, NSString *> *iOS12baseMap = [contentTypeMap mutableCopy];
-    [iOS12baseMap addEntriesFromDictionary:iOS12extras];
-
-    contentTypeMap = [iOS12baseMap copy];
   });
 
   // Setting textContentType to an empty string will disable any
   // default behaviour, like the autofill bar for password inputs
   self.backedTextInputView.textContentType = contentTypeMap[type] ?: type;
-#endif
 }
 
 - (void)setPasswordRules:(NSString *)descriptor
diff --git a/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm b/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm
index 54f9bbf0e2c700..b1af0851edae33 100644
--- a/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm
+++ b/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm
@@ -182,10 +182,8 @@ - (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &
   }
 
   if (newTextInputProps.traits.smartInsertDelete != oldTextInputProps.traits.smartInsertDelete) {
-    if (@available(iOS 11.0, *)) {
-      _backedTextInputView.smartInsertDeleteType =
-          RCTUITextSmartInsertDeleteTypeFromOptionalBool(newTextInputProps.traits.smartInsertDelete);
-    }
+    _backedTextInputView.smartInsertDeleteType =
+        RCTUITextSmartInsertDeleteTypeFromOptionalBool(newTextInputProps.traits.smartInsertDelete);
   }
 
   // Traits `blurOnSubmit`, `clearTextOnFocus`, and `selectTextOnFocus` were omitted intentionally here
diff --git a/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputUtils.mm b/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputUtils.mm
index a79ddff152fa91..06862324203e10 100644
--- a/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputUtils.mm
+++ b/packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputUtils.mm
@@ -43,11 +43,7 @@ void RCTCopyBackedTextInput(
   toTextInput.secureTextEntry = fromTextInput.secureTextEntry;
   toTextInput.keyboardType = fromTextInput.keyboardType;
   toTextInput.textContentType = fromTextInput.textContentType;
-
-  if (@available(iOS 11.0, *)) {
-    toTextInput.smartInsertDeleteType = fromTextInput.smartInsertDeleteType;
-  }
-
+  toTextInput.smartInsertDeleteType = fromTextInput.smartInsertDeleteType;
   toTextInput.passwordRules = fromTextInput.passwordRules;
 
   [toTextInput setSelectedTextRange:fromTextInput.selectedTextRange notifyDelegate:NO];
@@ -185,7 +181,7 @@ UITextContentType RCTUITextContentTypeFromString(std::string const &contentType)
   static NSDictionary<NSString *, NSString *> *contentTypeMap;
 
   dispatch_once(&onceToken, ^{
-    NSMutableDictionary<NSString *, NSString *> *mutableContentTypeMap = [@{
+    contentTypeMap = @{
       @"" : @"",
       @"none" : @"",
       @"URL" : UITextContentTypeURL,
@@ -213,14 +209,9 @@ UITextContentType RCTUITextContentTypeFromString(std::string const &contentType)
       @"telephoneNumber" : UITextContentTypeTelephoneNumber,
       @"username" : UITextContentTypeUsername,
       @"password" : UITextContentTypePassword,
-    } mutableCopy];
-
-    [mutableContentTypeMap addEntriesFromDictionary:@{
       @"newPassword" : UITextContentTypeNewPassword,
-      @"oneTimeCode" : UITextContentTypeOneTimeCode
-    }];
-
-    contentTypeMap = [mutableContentTypeMap copy];
+      @"oneTimeCode" : UITextContentTypeOneTimeCode,
+    };
   });
 
   return contentTypeMap[RCTNSStringFromString(contentType)] ?: @"";