Transcript
A wafrn woot (post) by @[email protected] saying "Microsoft Authenticator needs me to validate with Authenticator in order to log in with Authenticator to use it to authenticate another app with Authenticator. Here is the app telling me to open itself to validate itself with itself. #infosec #iHateComputers" It has a screenshot showing the microsoft authenticator app.
I would highly recommend Ente Auth for 2FA on iOS devices.
It allows for export to a file that you can then import into other apps. You can also use their own sync service.
Personally I use Ente Auth on iOS and Aegis on Android. Both support backups to files (I back up to my own nextcloud) and imports from each other. I could just use Ente Auth on my android devices too, but I just prefer Aegis.