What do I need to make this work? I have S23 Ultra and Tab S8+ both running 5.1.
How can I make them see each other? I tried with BT mouse, then what?
What exactly are you trying to do?
this is what I am assume is meant by multi-control:
( Samsung Multi Control allows you to control your Galaxy Tab or Galaxy smartphone using a Galaxy Book laptop. Heck, you can even use a Galaxy Tab with a keyboard and mouse connected to it to control a Galaxy phone.)
so possible I am misunderstanding the OP’s question