Isn’t Google forcing your accounts to be linked to a safe device nowadays (which in turn is probably linked to biometry or other identity proof). I say this because recently I changed smartphone after 6 years, and it was hell to even connect to my gmail for some accounts that I had not added as phone account to the previous device. Since they didn’t have a phone number attached to them, even if I knew the passwords as well as the security question answer, I still could not retrieve 2 out of 5. I am moving away from Google for many reasons, but this one pissed me off

I went for another foss one a while ago, works flawlessly https://authenticatorpro.jmh.me/