Kbin is already discoverable and you can already access other communities on different instances via Kbin.social (I don't know if it is possible the other way around for now because of Cloudfare enabled).
The thing is because of the influx of new users Cloudfare is turned on temporarily so that the site doesn't crash constantly, it only messes up Kbins "place" in the universe for the time being ;) from what I understood.
Beehaw.org is an lemmy instance for example and if you go to "Magazines" here and type in "Beehaw" you can see the beehaw communities and access them from the Kbin instance.