diff --git a/packages/discord.js/src/structures/GuildOnboarding.js b/packages/discord.js/src/structures/GuildOnboarding.js
index e4ed510884c45..7921719211265 100644
--- a/packages/discord.js/src/structures/GuildOnboarding.js
+++ b/packages/discord.js/src/structures/GuildOnboarding.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const { _transformGuildOnboardingPrompt } = require('../util/Transformers');
+
 /**
  * Represents the onboarding data of a guild.
  */
@@ -15,7 +17,7 @@ class GuildOnboarding {
      * The prompts shown during onboarding
      * @type {GuildOnboardingPrompt[]}
      */
-    this.prompts = data.prompts.map(prompt => this._transformPrompt(prompt));
+    this.prompts = data.prompts.map(prompt => _transformGuildOnboardingPrompt(prompt));
 
     /**
      * The ids of the channels that new members get opted into automatically
@@ -42,24 +44,6 @@ class GuildOnboarding {
    * @property {GuildOnboardingPromptType} type The type of the prompt
    */
 
-  /**
-   * Transforms a raw prompt object into a GuildOnboardingPrompt
-   * @param {Object} prompt The raw prompt object
-   * @returns {GuildOnboardingPrompt}
-   * @private
-   */
-  _transformPrompt(prompt) {
-    return {
-      id: prompt.id,
-      options: prompt.options.map(option => this._transformPromptOption(option)),
-      title: prompt.title,
-      singleSelect: prompt.single_select,
-      required: prompt.required,
-      inOnboarding: prompt.in_onboarding,
-      type: prompt.type,
-    };
-  }
-
   /**
    * The data for an option of a guilds onboarding prompt
    * @typedef {Object} GuildOnboardingPromptOption
@@ -77,26 +61,6 @@ class GuildOnboarding {
    * @property {?Snowflake} id The id of the emoji
    * @property {?string} name The name of the emoji
    */
-
-  /**
-   * Transforms a raw prompt option object into a GuildOnboardingPromptOption
-   * @param {Object} option The raw prompt option object
-   * @returns {GuildOnboardingPromptOption}
-   * @private
-   */
-  _transformPromptOption(option) {
-    return {
-      id: option.id,
-      channelIds: option.channel_ids,
-      roleIds: option.role_ids,
-      emoji: {
-        id: option.emoji_id,
-        name: option.emoji_name,
-      },
-      title: option.title,
-      description: option.description,
-    };
-  }
 }
 
 exports.GuildOnboarding = GuildOnboarding;
diff --git a/packages/discord.js/src/util/APITypes.js b/packages/discord.js/src/util/APITypes.js
index 18af763d2ef46..35c7ee35ec649 100644
--- a/packages/discord.js/src/util/APITypes.js
+++ b/packages/discord.js/src/util/APITypes.js
@@ -273,6 +273,11 @@
  * @see {@link https://discord-api-types.dev/api/discord-api-types-v10/enum/GuildNSFWLevel}
  */
 
+/**
+ * @external GuildOnboardingPromptType
+ * @see {@link https://discord-api-types.dev/api/discord-api-types-v10/enum/GuildOnboardingPromptType}
+ */
+
 /**
  * @external GuildPremiumTier
  * @see {@link https://discord-api-types.dev/api/discord-api-types-v10/enum/GuildPremiumTier}
diff --git a/packages/discord.js/src/util/Transformers.js b/packages/discord.js/src/util/Transformers.js
index 6b096dfc9f9ec..0ce2dbf7c410c 100644
--- a/packages/discord.js/src/util/Transformers.js
+++ b/packages/discord.js/src/util/Transformers.js
@@ -16,4 +16,32 @@ function toSnakeCase(obj) {
   return Object.fromEntries(Object.entries(obj).map(([key, value]) => [snakeCase(key), toSnakeCase(value)]));
 }
 
-module.exports = { toSnakeCase };
+/**
+ * Transforms a raw prompt object into a GuildOnboardingPrompt
+ * @param {Object} prompt The raw prompt object
+ * @returns {GuildOnboardingPrompt}
+ * @ignore
+ */
+function _transformGuildOnboardingPrompt(prompt) {
+  return {
+    id: prompt.id,
+    options: prompt.options.map(option => ({
+      id: option.id,
+      channelIds: option.channel_ids,
+      roleIds: option.role_ids,
+      emoji: {
+        id: option.emoji_id,
+        name: option.emoji_name,
+      },
+      title: option.title,
+      description: option.description,
+    })),
+    title: prompt.title,
+    singleSelect: prompt.single_select,
+    required: prompt.required,
+    inOnboarding: prompt.in_onboarding,
+    type: prompt.type,
+  };
+}
+
+module.exports = { toSnakeCase, _transformGuildOnboardingPrompt };
diff --git a/packages/discord.js/typings/index.d.ts b/packages/discord.js/typings/index.d.ts
index 7fff903096c2a..a630e8cdd551d 100644
--- a/packages/discord.js/typings/index.d.ts
+++ b/packages/discord.js/typings/index.d.ts
@@ -1523,9 +1523,6 @@ export class GuildMember extends PartialTextBasedChannel(Base) {
 
 export class GuildOnboarding {
   private constructor(data: any);
-  private _transformPrompt(prompt: any): GuildOnboardingPrompt;
-  private _transformPromptOption(option: any): GuildOnboardingPromptOption;
-
   public guildId: Snowflake;
   public prompts: GuildOnboardingPrompt[];
   public defaultChannelIds: Snowflake[];