Is Face ID linked to the motherboard in any way?

So I came across an iPhone X that I just bought, that has every part but the motherboard.

Knowing that TouchID couldn’t be really changed without changing a lot of parts on the older iPhones, my question is, is it the same for Face ID?

I read that it’s linked to the camera, but it wasn’t clear enough for me and people are currently selling motherboards with FaceID so I really don’t know haha.

Thanks in advance, and sorry if this question has already been posted, I couldn’t find an answer that suits me!