Use a ref instead of a variable.

src/pages/iou/request/step/IOURequestStepConfirmation.js

@@ -1,6 +1,6 @@
 import lodashGet from 'lodash/get';
 import PropTypes from 'prop-types';
-import React, {useCallback, useEffect, useMemo, useState} from 'react';
+import React, {useCallback, useEffect, useMemo, useState, useRef} from 'react';
 import {View} from 'react-native';
 import {withOnyx} from 'react-native-onyx';
 import _ from 'underscore';
@@ -105,7 +105,7 @@ function IOURequestStepConfirmation({
         [transaction.participants, personalDetails],
     );
     const isPolicyExpenseChat = useMemo(() => ReportUtils.isPolicyExpenseChat(ReportUtils.getRootParentReport(report)), [report]);
-    let formHasBeenSubmitted = false;
+    const formHasBeenSubmitted = useRef(false);
 
     useEffect(() => {
         if (!transaction || !transaction.originalCurrency) {
@@ -230,11 +230,11 @@ function IOURequestStepConfirmation({
             const trimmedComment = lodashGet(transaction, 'comment.comment', '').trim();
 
             // Don't let the form be submitted multiple times while the navigator is waiting to take the user to a different page
-            if (formHasBeenSubmitted) {
+            if (formHasBeenSubmitted.current) {
                 return;
             }
 
-            formHasBeenSubmitted = true;
+            formHasBeenSubmitted.current = true;
 
             // If we have a receipt let's start the split bill by creating only the action, the transaction, and the group DM if needed
             if (iouType === CONST.IOU.TYPE.SPLIT && receiptFile) {