AR Resources?

Is there any good resources I can look to to learn Unreal Engine’s AR functionality? I am coming from an ArchViz background and already know Unreals Interface and am trying to avoid having to learn Unity. We are wanting to also wade into some AR experiences, but all the documentation I find online is either for hololense (which is a very small audience) and very little on ARCore/ARKit (which feels more inline with the general public experiences we are going for). That said unity has a lot of documentation on topics like Occlusion, Depth, VPS options, etc. I cant tell though if thats because Unity is more capable or if its just a lack of documentation on Unreal’s part. If it is a lack of documentation, I would love any course or resource recommendations. (Free or even some paid)