VR Tourviewer for Quest is a made specifically to watch mono- and stereoscopic 360 degrees panorama tours with the Oculus Quest.
Currently tours created with Pano2VR are supported, only very basic krPano support has been added.
Installation instructions can be found here: Install VR Tourviewer on Oculus Quest
Note that you can purchase a white label version with customized splash screen, logo, launcher icon, hotspot colors, and even a custom panorama as the background of the menu area, tailored for your business, project or product. Click here for more information.