Meta Quest 3 viewer for gigapixel photospheres?

[twalp]

Is there a Meta Quest-compatible viewer that fully supports viewing gigapixel photospheres, with the ability to zoom in and out while displaying the high resolution of the original image?

Equirectangular images capable of being opened in a viewer on the goggles must be so small that much of the resolution is lost. So I figured I could achieve my goal using Pano2VR to view them at full resolution using the built-in browser.  As it turns out, the image is still hardly better than when I directly view the small equirectangular image. Worse, the browser does not support zooming in/out.

I'm hoping that better resolution and full control is available in an app that runs in the goggles but uses the GPU of a tethered Windows PC, like what is possible with Google Earth VR and Microsoft Flight Simulator. Does that exist?

[Mike Cowlishaw]

How big are the images?  (I'm not familiar with Met Quest, but PanGazer will handle up to maximum JPEG images, which are four gigapels, with zooming, etc..)