Thanks! that seems to work!
(i opened BaseEngine.ini from
C:\Program Files\Epic Games\UE_5.3\Engine\Config
and set HMD priority like this:
[HMDPluginPriority]
; Since SteamVR also works with the Oculus Rift, give priority to the native Oculus plugin before trying SteamVR.
; OpenXR is production ready and, if enabled, should be the priority plugin. For 4.27, we still need to prioritize
; the native plugins due to runtime features that are not yet supported in OpenXR.
OpenXRHMD=40
SteamVR=30
OculusHMD=20