There could be a number of reasons for this. If you're porting an existing project, make sure you have OpenXR selected in the Project Settings for XR Plug-in Management, with Snapdragon Spaces Features selected. I would also do some other verification tests such as attempting to build and run the Core Samples from your ported project to see if it's anything in your settings or if the issue is with your Scene Hierarchy to help isolate the issue.
Tomer
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