Public MIX/MUC search
This site contains a list with most of the public MUCs. It were nice if you could search that list in Kaidan: https://muclumbus.jabbercat.org/
The problem would be that (the JID or IP-Address) and the search requests are sent to a 3rd party service. The solution would be to either sync the whole list or hosting an own instance (but that would still only partially solve the problem).