Just today I witnessed someone working from home who had to move to a new system at work. Part of the instructions involved deactivating their 2FA app, which was apparently still needed for a later step in the process. They were supposed to use a backup phone number in the account to receive a text code to sign in, but, of course, there’s no backup phone number in their account.
If only their job used this scheme instead. sigh
In case you were wondering