I recently opened 3 bank accounts. It's not only the challenger banks: nowadays banks will also encourage you to use their app for 2FA. You can use a proprieta

I recently opened 3 bank accounts. It's not only the challenger banks: nowadays banks will also encourage you to use their app for 2FA. You can use a proprietary token instead, but you'd have to pay for it (the app instead is free). 2FA sms is not supported with some banks (and that's good). I think the UK is an exception, since for 2 of the banks I had accounts with, they just used a 2nd "memorable" password as "2FA" (avoiding the requirement of a smartphone)