Godot now supports Vulkan foveated rendering on Android, Application SpaceWarp, DirectX 12, and OpenXR render models, and can build a universal OpenXR APK.
If you’re unaware, Godot is a free and open-source alternative to Unity and Unreal Engine. It’s technically controlled by the non-profit Godot Foundation, but all development takes place in the open.
Since last year, Meta has been funding a group of Godot veterans to improve the engine’s support for OpenXR and Quest feature extensions, as well as to build high-quality samples and documentation.
Valve have their own in-house engine and in the past they have used unity to make XR stuff like “The Lab”. They’ve never officially done anything at all with godot though.