Every Community specifies the content-types they (want) to work with in the #communikey event. Whatever they need to work toward their niche / goal.
These can be content types that Zapchat doesn't support AT ALL. Zapchat is there as a daily driver to handle the replies, zaps, reactions, labeling, etc... AROUND those publications. With a relatively large pool of content types that it displays and let's you create within the app.
For example: it makes zero sense fir us to render and let users Collab on 3D models or Figma-like files. But, we can handle the replies on those files, no problem.
And then link out to the Apps the community recommends for opening/creating those 3D models.
TLDR: Yes, and the integration is on the protocol level. Not something custom to Zapchat. Chachi is already building on the sane pattern.