One of the authors here. Yes! Aegis can scan the QR codes that Google Authenticator presents in the "Transfer accounts" screen. It's also possible to import directly from Google Authenticator's internal database if you have root access.

Just migrated all devices in my home. Without root access, I had to use another phone to take a picture of the QR and then scan with Aegis. This way it had difficulty understanding QR that had more then 4 entries. Anyway, waiting for the icons support, but for now it is another Google app down! Thanks a lot.

Thank you so much for this feature! Google Authenticator has been holding my phone ransom on Android 9. I've got way too many 2fa keys to reconfigure manually and add to a new client.

I'm all backed up and installing the latest Lineage OS build now.