AirPlay option is permanently off. How do I make it work?

Hi all,

I'm trying to get AirPlay to work on my Hackintosh laptop so I can extend my display to another machine, but the option is turned off in System Preferences with no option to turn it on (photo attached). I'm running off of the Intel UHD 630 GPU (Coffee Lake), and I have the following kexts and Clover configurations:

Relevant Kexts:
VirtualSMC.kext
Lilu.kext
FakePCIID_Intel_HD_Graphics.kext
WhateverGreen.kext

DSDT:
Change GFX0 to IGPU.

Boot arguments:
nv_disable=1

Devices:
Fake ID: 0x3E928086 Intel GFX.

Graphics:
Inject Intel checked, ig-platform: 0x3E9B0000

SMBIOS: MacBook Pro 15,1

Under System Report, the GPU is recognised with 1536 MB of VRAM. Device ID 0x3e92.

I had this problem with High Sierra and I still have it now after upgrading to Mojave.

Any help is greatly appreciated. I have a Tongfang GK5CN6Z laptop.