This is only true in some countries, and tbh. having this as the state of the art, sounds a bit dystopian. I've been using my BankID, which is a Norwegian electronic identity solution, to log into banks and such, for decades now. With these type of solutions, there is no way that taking control over phone numbers make any difference when trying to get access to a bank account.

Btw. this type of electronic identity solution are not Norway specific, I know all the other Nordic countries have them, and they are, as far as I know fairly popular in the rest of Europe as well.