I use Anysoft keyboard and I can’t see a button to switch between keyboards. Even if there was a button, I can’t switch to Gboard because I can’t see it in my Android settings. This is because it’s installed with Shelter and I can use Gboard only with Shelter installed apps. However, my main Apps I would use Gboard with are not Shelter installed apps (e.g. chat app, car navigation or note app).
Installing Gboard without Shelter is not an option for me.
@tcecyk thanks for your hints. I’ve updated the summary and will try out foundation.e.voice.