jmpessoa, god bless your hands.
I tried the feature you added, as I understand it creates and signs a new keystore with the application.
Well, if there is a keystore we have created and used before, can we select it and sign it?
Regarding signing, I also tried Android Studio 4.1.2
The project can be imported without any problems and signed as V1 or V2. It also works stably on the device.