yeah but facebook has its own fork of the engine https://github.com/Oculus-VR/UnrealEngine/tree/oculus-5.2
though maybe you can make it work with openXR on the mainstream engine but i havent tried.
probably it will lack certain experimental features and optimizations.
also the forked oculus have some settings pre-emptively disabled that do not work with the device, which will save you pain of accidentally breaking your project.
actually for version 5.3 in precise they don´t have a branch just yet. is to be assumed they are behind official release in time.