AirPlay Receiver option missing from sharing preferences pane

Mac mini 2018. macOS Monterey 12.5 I have previously used this desktop as an AirPlay receiver. In the sharing pane of the system preferences there was a tick box for turingin airplay receiver on/off. That tick box is no longer present, and I don't know why. I have reset the NVRAM, and booted in safe mode, with no change. In System>Library>PreferencesPanes>SharingPref.PrefPane>Contents>Resources there is a xml file named "service list." It reads:

class
		OpticalDiscSharing
		clientonly
		
		nibname
		OpticalDiscSharing
		searchKeyword
		Services_DVDorCDSharing
	
	
		class
		ScreenSharing
		clientonly
		
		nibname
		ScreenSharing
		searchKeyword
		Services_ScreenSharing
	
	
		class
		AppleSharing_FileSharing
		clientonly
		
		nibname
		AFPStopWindow
	
	
		class
		AppleSharing_PrinterSharing
		clientonly
		
		nibname
		PrinterService
		searchKeyword
		Services_PrinterSharing
	
	
		class
		AppleSharing_RemoteLoginSharing
		clientonly
		
		nibname
		RemoteLoginService
		searchKeyword
		Services_RemoteLogin
	
	
		class
		ARDSharing
		clientonly
		
		nibname
		ARDService
		searchKeyword
		Services_ARDService
	
	
		class
		AppleSharing_AppleEventSharing
		clientonly
		
		nibname
		RemoteAEPassword
		searchKeyword
		Services_RemoteAppleEvent
	
	
		class
		InternetService
		clientonly
		
		nibname
		InternetService
		searchKeyword
		Internet
	
    
        class
        ContentCaching
        clientonly
        
        nibname
        ContentCaching
        searchKeyword
        Services_ContentCaching
    
    **
        class
        AirPlayReceiverSharing
        clientonly
        
        nibname
        AirPlayReceiverSharing
        searchKeyword
        Services_AirPlayReceiver
    **

(Bold added) Can I just change "false" to "true" and save the file? Any other ideas? I have no idea what I'm doing.