As I know, Coinbase uses the Authy app for 2FA until 31 march. They will no longer be supported after this date. If you do not migrate to Google 2FA or Duo, they will automatically remove the 2FA protection from your account.
Which time zone use on your phone, is there any difference in other devices which had regular access to Coinbase? it was a problem for me at one point until I put it on automatic time zone determination.
All my devices show the same time zone and I haven't moved out of this time zone. Gemini uses Authy, but I thought Coinbase/Coinbase Pro used Google Authenticator. I pretty sure that is asked for an Authenticator code not an Authy code.
Authy is an app like google authenticator and lot other similar authenticating apps which gives TOTP based codes. So if your authenticating apps is having sync issue then you need to resync it on the settings and he is saying if you are an Authy user you need to move to other authenticating apps or else your account will lose 2FA protection.
But why COinbase decided to close 2FA from authy and it is actually possible to find which authenticating apps we are using?