AMD is far more complicated than Intel based machines in this regard. There's never been an apple computer with an AMD CPU...
Also, there are a couple of kext projects that allow you to use AMD graphics, even iGPUs, on Hackintoshes. I have not tested this myself, but there are rumblings you may even be able to get this to work with a Steam Deck.
https://github.com/ChefKissInc/NootedRed
https://github.com/ChefKissInc/NootRX
A lot has changed in the Hackintosh space around AMD of late. I don’t think the automatic pessimism is as warranted as it once was.
id guess vmxon and vmxoff and vmcs structures etc. will still be the same on both? a lot of security stuff etc. is totally different (amd psp vs intel ME etc.)
(still agree ofc, but just thinking about where these differences are located as the cpus can run very similar or the same code)