Making my OCLP Mac 2012 an Airplay Receiver

Hi,

I am running macOS 15.2 with OCLP 2.2.0 on a 2012 MacBook Pro. I am also getting a 2024 Mac mini Pro, and I want to use my 2012 MacBook Pro screen as a second display for the Mac mini. I am trying to use AirPlay for this. I have turned on screen sharing, but I cannot find the setting to "Make this Mac an AirPlay receiver." I have tested mirroring from my iPhone to this Mac, but it does not appear in the list of devices for AirPlay.

Any help would be very much appreciated.