I discovered this grateful app on F-droid when I ditched all GAPPS and privative google components, so I realised that the app is so similar (in design) with Authenticator Pro, so i thinked, why don't suggest merge both apps into a New App with Password Manager and 2FA auth? both apps are similar in design, and objetive, secure our accounts sessions.
This is not a new concept, Bitwarden actually does, but it is just available for paid users, and it is more comfortable having both functions in a single app.
The app is released under GPLv3 license (so it is libre too and both licenses are compatible) and it is developed with C# and Python langs, but I really do not know about tecnical impediments, but I suppose it is possible to do something, I want to say that I am not the Authenticator Pro developer and I do not know C#, Kotlin or Python, so, I cannot help coding, but I can help trying the betas, reporting bugs, translating to spanish and giving a periodical feedback.
My intention opening these issues is to leave the suggestion under the table, joining efforts you can do more and better things, please consider the suggestion.
Here's the issue with the suggestion on Authenticator Pro repository.