Flash message not showing

hello everyone, i'm using laravel 9 . now ihave issuse after save input/data and redirect /the session message not showing .but in other controller is work. and this my code.

//view {{ (@$data) ? 'Ubah' : 'Simpan' }}

//controller public function update(ProfileUpdateRequest $request): RedirectResponse { $request->user()->fill($request->validated());

    if ($request->user()->isDirty('email')) {
        $request->user()->email_verified_at = null;
    }

    $request->user()->save();
    
    session()->flash('success', 'Data Updated!');
    return redirect()->route('profile.edit');
}

//route

    Route::put('/', ['uses' => 'App\Http\Controllers\ProfileController@update', 'as' => 'update']);