ARKit/core functionality does work and regardless of your frustration. Start working with 4.26. This is where Epic’s XR team is putting an incredible level of effort to provide unified architecture support for AR/VR.
We’re working across a number of HMDs and mobile platforms.
No developer’s focus was ever fully on MagicLeap but they were the only ones having distributed to the consumer market till they face-planted. Their capabilities on HoloLens 2 are about as impressive as you can get.
Why have no developers created an expansive game in AR? No one will spend time holding a mobile device out in front of them for more than a few minutes… it doesn’t exist.
When the HMDs arrive on the market in the next 12-24 months you will see support grow exponentially everywhere.
Check out 4.26.