Universal control
So I have a MacBook Pro 2019, ipad air 4th gen and a M1 mac mini.
The M1 mac mini can only control either one device at a time and can not control two together.
The MacBook Pro can't detect ipad air and can't use universal control.
I tried all those handoff, firewall suggestions and it doesn't work.
I used to be able to use universal control on only macbook and iPad, but the OS update seems mess all up.
MacBook Pro 13″, macOS 13.1