Google Authenticator now allows users to create and download a backup of their codes. Were you able to import this backup into Aegis or did you add the 2FA codes manually?
That's not quite correct... GA now allows you to create a single "QR Code" on screen that you're supposed to scan with Google Authenticator on a "new" device and it will import all your codes for you... but there is no option to "save" that QR code and screenshot is disabled within the app.
This exact QR can still be used as a backup.
While the application does not allow screenshots to be taken, other applications which have the permission to add an overlay over other apps, still can save that QR, so it can act as a form of backup.
Then, whenever needed, a scan with GA or other authenticator apps who support the format, will restore the saved seeds.