Hungary is in EU and the most popular bank sends a one-time code (with expiry) via SMS for logging in, making a transaction, for the mere displaying of "Telecode", and so on.
There is no TOTP, only this one-time code sent via SMS.
I do not use their apps on any platform. I login via their website when I need to which is rare. When I make a payment via card, I have to provide the provided 3-digit "Telecode" and the one-time code sent via SMS. There is an option "What if I do not have access to that phone number?" or whatever the literal translation is, but I have not checked that out yet.
... which is why I left a comment asking you about the details. You telling me SMS is banned and referring to EU regulations just left me more confused given the above.