Problem:
Hubitat has created "Discovered Devices" integrations for many things and the "Available Extras" on the Home screen leading to a list of "things" detected by mDNS (or however). But, those devices/services might have actually been handled by a different Hubitat. So having them there is annoying without closing the entire section out (and thus not seeing NEW integrations that might be beneficial or newly detected devices).
Possible Solution:
Add a part of the checking into Hub Mesh. If a Hubitat is already "handling" the devices for Chromecast for example, do not have hubs it is meshed with display that integration (it could always be a toggle or separate field section that could be hidden also for "Available via Hub Mesh" features).
Related 1:
Showing what integrations are also available, but have no devices detected AND what integrations have already been installed might also be useful. This could be especially helpful for new but skilled users. "Oh, it has Chromecast integration but my Chromecast devices are not being detected, I can figure that out...". As it stands now, someone might not even know there IS a Chromecast integration available, or a Tuya one, etc...
Related 2:
Change the naming related to the RTSP integration. My primary Hubitat shows "Unifi devices found: Install RTSP Integration". My secondary Hubitat handles these (and is meshed with the primary). But, I have more than just Unifi devices (Amcrest & Jennov also) so maybe this should be "ONVIF cameras found: Install RTSP Integration". The Unifi mention also makes me think more of the Unifi integrations that Hubitat is now offering, but is NOT listed in here as a possible.