I have a Galaxy Fold 4 so I have both Swiftkey and Swiftkey Beta installed and use a Tasker profile to set the default keyboard to one or the other depending if I'm using the inner or outer screen. I did this so I could have a split keyboard when I'm using the inner screen (because I'm holding the phone with 2 hands and it's easier to type this way) and the regular keyboard when I'm using the outer screen. It was a little finicky to set up but truthfully I have become so used to it that I honestly forgot that I had 2 different keyboards until I started thinking about it because of this post.