There are standards in terms of the delivery mechanism in WebXR (XR = one JS API for both VR or AR hardware), Three.js being the leading implementation.
My interest is in 360º photography (I have a Ricoh Theta Z1 camera). You can share immersive panoramas of far-off places (like the Mont Saintt Michel, France) with a cheap $200 Oculus Go (kindly subsidized by Meta). What’s even better, this works using open web technology, no proprietary platforms required unlike iOS or Android app development. Have a look at:
It works on desktop, on a phone with the accelerometer, and with VR goggles.
There is no standard for how metaverses should interoperate but then again I can’t see why they would want to, beyond links taking you from one to the other, just as websites have hyperlinks but no other connection.
