diff --git a/packages/components/src/custom-select-control-v2/custom-select.tsx b/packages/components/src/custom-select-control-v2/custom-select.tsx
index c18d24a6769ae..d91b47a90c6bb 100644
--- a/packages/components/src/custom-select-control-v2/custom-select.tsx
+++ b/packages/components/src/custom-select-control-v2/custom-select.tsx
@@ -58,12 +58,9 @@ const UnconnectedCustomSelectButton = (
 	>
 ) => {
 	const {
-		defaultValue,
 		renderSelectedValue,
-		onChange,
 		size = 'default',
 		store,
-		value,
 		...restProps
 	} = useContextSystem( props, 'CustomSelectControlButton' );
 
diff --git a/packages/components/src/custom-select-control-v2/default-component/index.tsx b/packages/components/src/custom-select-control-v2/default-component/index.tsx
index bd7a91936ebd5..5e12c2054c644 100644
--- a/packages/components/src/custom-select-control-v2/default-component/index.tsx
+++ b/packages/components/src/custom-select-control-v2/default-component/index.tsx
@@ -10,10 +10,10 @@ import _CustomSelect from '../custom-select';
 import type { CustomSelectProps } from '../types';
 
 function _NewCustomSelect( props: CustomSelectProps ) {
-	const { defaultValue, onChange, value, ...restProps } = props;
+	const { defaultValue, onSelectionChange, value, ...restProps } = props;
 	// Forward props + store from v2 implementation
 	const store = Ariakit.useSelectStore( {
-		setValue: ( nextValue ) => onChange?.( nextValue ),
+		setValue: ( nextValue ) => onSelectionChange?.( nextValue ),
 		defaultValue,
 		value,
 	} );
diff --git a/packages/components/src/custom-select-control-v2/legacy-component/index.tsx b/packages/components/src/custom-select-control-v2/legacy-component/index.tsx
index 82afeae5727ff..a8ae21c047c5e 100644
--- a/packages/components/src/custom-select-control-v2/legacy-component/index.tsx
+++ b/packages/components/src/custom-select-control-v2/legacy-component/index.tsx
@@ -6,7 +6,6 @@ import * as Ariakit from '@ariakit/react';
 /**
  * WordPress dependencies
  */
-import deprecated from '@wordpress/deprecated';
 import { useMemo } from '@wordpress/element';
 /**
  * Internal dependencies
@@ -21,7 +20,6 @@ function _LegacyCustomSelect( props: LegacyCustomSelectProps ) {
 	const {
 		__experimentalShowSelectedHint,
 		__next40pxDefaultSize = false,
-		__nextUnconstrainedWidth,
 		options,
 		onChange,
 		size = 'default',
@@ -81,16 +79,6 @@ function _LegacyCustomSelect( props: LegacyCustomSelectProps ) {
 		}
 	);
 
-	if ( __nextUnconstrainedWidth ) {
-		deprecated(
-			'Constrained width styles for wp.components.CustomSelectControl',
-			{
-				hint: 'This behaviour is now built-in.',
-				since: '6.4',
-			}
-		);
-	}
-
 	const renderSelectedValueHint = () => {
 		const { value: currentValue } = store.getState();
 
diff --git a/packages/components/src/custom-select-control-v2/stories/default.story.tsx b/packages/components/src/custom-select-control-v2/stories/default.story.tsx
index a3b4d45ecb722..062d18cf24fdb 100644
--- a/packages/components/src/custom-select-control-v2/stories/default.story.tsx
+++ b/packages/components/src/custom-select-control-v2/stories/default.story.tsx
@@ -58,9 +58,9 @@ const ControlledTemplate: StoryFn< typeof NewCustomSelect > = ( props ) => {
 	return (
 		<CustomSelect
 			{ ...props }
-			onChange={ ( nextValue: string | string[] ) => {
+			onSelectionChange={ ( nextValue: string | string[] ) => {
 				setValue( nextValue );
-				props.onChange?.( nextValue );
+				props.onSelectionChange?.( nextValue );
 			} }
 			value={ value }
 		/>
diff --git a/packages/components/src/custom-select-control-v2/types.ts b/packages/components/src/custom-select-control-v2/types.ts
index 148edb1a1ee18..3a1eb6b26672f 100644
--- a/packages/components/src/custom-select-control-v2/types.ts
+++ b/packages/components/src/custom-select-control-v2/types.ts
@@ -23,7 +23,7 @@ export type CustomSelectButtonProps = {
 	/**
 	 * A function that receives the new value of the input.
 	 */
-	onChange?: ( newValue: string | string[] ) => void;
+	onSelectionChange?: ( newValue: string | string[] ) => void;
 	/**
 	 * Can be used to render select UI with custom styled values.
 	 */