I don’t work for Wyze. The Moderators and Mavens are users like yourself who volunteer to help out on the forums.
The quickest answer to some of your questions is Wyze is not an international company yet, and it’s not even a surety they will become one. Please see this support article. Even though they have not authorized international sales, some companies like Amazon have ignored that and sell them internationally anyway.
Here is a #wishlist request for third-party authenticators: Add authenticator app(s) for 2 Factor Authentication (2FA).