I would like to see Theta Z1 video in real time on meta quest2.

One of the plugins here may work:

If you are developing an app, most people use Unity.

See this:

This video is old and the better technique is to use the skybox as shown above.

However, it may still have some relevant overview concepts for you to get started.

https://youtu.be/REzXPkgJx2A?feature=shared