Ended up leaving it in the Unreal Engine installation folder, under Engine/Plugins/Marketplace. I also put the MetaXRPlatform (Oculus Developer Center | Downloads) plugin under that folder.
Then, made sure to start a whole new VR Template, in which I did, respecting the exact order :
- deactivated OpenXR plugins
- reloaded the editor
- activated the MetaXR plugin
- reloaded the editor
- setup the project settings for my platform (Minimum SDK Version : 32, Target SDK Version : 32, NDK version : 25.1.8937393, Java JDK : 17.0.9, SDK API Level : latest, NDK API Level : android-32)
I’m still having other issues (Oculus touch buttons working on first launch of the template but not on the second), but I managed at least to obtain an apk that launches on the Quest.