Hey,
I have not found any significant information on this but I am missing one essential feature in my Tab S8+ / S22 Ultra combi: Using my smartphone as a trackpad in the tablets dex mode. This could really extend the possibilities of Dex and should not be to hard to implement(?) since there are some other apps using the two screen possibilities.
Do you have any information on how to make it possible already and if not: How can I suggest something like this to the Samsung Dev team?
Best,
Marius