In my case they didn’t disable the option to use any authenticator for 2FA.
So I just use another one.
I don’t see why forcing MS Authenticator will be better than any other authenticator.
The person who forces it is for sure not a security expert.
It will be easier to hackers to hack 2FA when they know what the authenticator app is, versus hundreds of different authenticator clients.
Paradoxically, due to these charges, EU profit from the consumer rights.