You can use Authenticator Pro (android, opensesource) and Proton Pass, both let you copy the TOTP generation code to paste into another without problem. Both generate exact code
In fact that’s how I am using them right now, with Authenticator Pro is my on-device, offline, encrypted backup offline backup TOTP for Pass.
I guess it is not as straight forward as export import as you hope, but it’s not as bad as other options used to be.
sugar_in_your_tea@sh.itjust.works 6 months ago
As long as you can access the keys, you can swap authenticator apps.
I tried a few until I landed in Aegis, and I have two on my desktop that I’m trying out as well. Just get something that allows exporting the keys and there will be a path to switching apps.