@TheFrenchNob In my case MetaXR is disabled by default in the VR template (should be default in UE5), maybe you changed the plugin config in the engine to be enabled by default?
A workaround so for my problem is launching via “All_Android_On_[…]”, because there are no “(” or “)” in the name. So this looks like a bug when creating the adb.exe params, epic have to escape special chars like “(” or “)” or change the device name.
I created a tutorial post with all configs for UE4 and UE5 which worked so far for me (will add the link here when epic approved it).