...So considering above studies, I think there are no VPN hassle with Binance.
Binance does not prohibit working through a VPN, although it recommends not using it. But you need to remember that if you use an American IP, you will definitely receive a message asking you to close your account on binance.com and register an account on binance.us.
Yes they did not prohibit people from using VPN, but it will be a bit of hassle for you since codes are needed if you did not know your email or if you uninstall unexpectedly your authenticator that could be a huge problem, your device will be acknowledged as new and it will require a sign in from the previous one with the same IP that you used, so it is not prohibited but it will lead you to a bigger problem if your credentials are not available.