Are you running a site derived from the streams repository (or a fork)? Feel free to add a comment here, and tell us about your instance.
You can see a list of streams-based instances using this trick:
From your own streams-based instance:
/communities&typeOr using this instance:
https://forum.statler.ws/communities&typeThis ought to display instances which support Zot/Nomad protocols, are not Hubzilla, and are not hidden. (This may include a few sites running older software such as Zap, and note that the instance providing this list probably doesn't know about every streams-based site in existence.)