Maybe fix WebXR first? iOS Safari still doesn't support it[0], so developing AR web apps for clients is not great. You basically have to use a service like 8thwall, which is a pain to work with compared to browser API's. And it's expensive.
I suspect Apple views WebXR as an inefficient lowest common denominator API, not unlike Flash on mobile back in 2007, and they don’t want people writing apps on their platform against that.
They've been doing that for years and always end up yielding to the web standard. Happened with webapps, happened with web push notifications (finally being released).
Hopefully they are not thinking the same for WebXR, if so, we'd be years away from getting it.
But I kinda suspect they are releasing WebXR along with their AR glasses