sidecar not working on 16inch MacBook Pro 2019 core i9
-Both the Macbook and the iPad are connected to the same network
-Both had AirPlay turned on, so did they have Bluetooth.
-I opened my AirPlay and the iPad just -wasn't there its totally missing from the menu bar on the MacBook too.
-I then read the manual for sidecar and noticed that it had to be turned on in the system preferences, but when he opened them ; there just wasn't an option for it, nor it the search bar.
MacBook Pro 16″, macOS 10.15