Flash session data in stateful sanctum

Hi everyone... my question is simple.

Can I use flash session data when I'm working with stateful endpoints in sanctum?

For example, user enters his phone number in the first request. in order to verify it, I want to keep his phone number in the session, just for the next request.

Actually, I have tested this in postman and it was not available in the next request. I'm afraid I may have done something wrong.

As an example, here is my controller method:

    public function login(LoginRequest $request)
    {
        $data = $request->validated();

        try {
            event(new WantToLogin($data['mobile']));
        } catch (Throwable $th) {
            // return some error
        }
        $request->session()->flash('mobile', $data['mobile']);
        return response()->json([
			'message' => 'a token has been sent to your mobile phone'
		]);
    }