@@ -31,6 +31,7 @@
 
 ### Bug Fixes
 
+-   `Combobox.Root`: Preserve separate item and selected-value types for collections, including filtering callbacks ([#84094](https://github.com/WordPress/gutenberg/pull/84094)).
 -   `Autocomplete.Root`: Preserve item type inference in filtering, formatting, and highlight callbacks for flat and grouped items ([#84095](https://github.com/WordPress/gutenberg/pull/84095)).
 -   `Breadcrumb`: Keep a custom renderer's ref on the visible item ([#84069](https://github.com/WordPress/gutenberg/pull/84069)).
 -   `RadioGroup`: Preserve value type inference in callbacks. `RadioGroupControl`: Type selected values and callbacks as strings to match its items ([#83872](https://github.com/WordPress/gutenberg/pull/83872)).
 
@@ -8,9 +8,11 @@ import { DirectionProvider } from '../../../utils/direction-provider';
  * See `SearchableSelectControl` and `SearchableChipSelectControl` for standard
  * implementations of a single and multiple selection combobox.
  */
-export function Root< Value, Multiple extends boolean | undefined = false >(
-	props: ComboboxRootProps< Value, Multiple >
-) {
+export function Root<
+	Value,
+	Multiple extends boolean | undefined = false,
+	Item = Value,
+>( props: ComboboxRootProps< Value, Multiple, Item > ) {
 	return (
 		<DirectionProvider>
 			<_Combobox.Root { ...props } />
 
@@ -145,7 +145,8 @@ export type ComboboxPopupProps = ComponentProps< typeof _Combobox.Popup > &
 export type ComboboxRootProps<
 	Value,
 	Multiple extends boolean | undefined = false,
-> = _Combobox.Root.Props< Value, Multiple >;
+	Item = Value,
+> = _Combobox.Root.Props< Value, Multiple, Item >;
 
 export type ComboboxSeparatorProps = Omit<
 	ComponentProps< typeof _Combobox.Separator >,