In Norway we have "BankID" which is a 2FA solution for authentication and digital signature. It started as a normal 2FA solution with a hardware token combined with username (social security number) and password. A few years ago they introduced a mobile solution where you don't get a SMS or get prompted by an app, but rather it's some kind of functionality on the SIM card. Very convenient and works on all banks, most finance institutions and everywhere else you need to sign things.