FYI, Friendica has full support for groups, natively called Friendica Forums, including Kbin Magazines & Lemmy Communities which show exactly like a local Friendica Forum (for a reverse example you can also access https://libranet.de/profile/fellowship on kbin, but not on lemmy), unlike mastodon which doesn't have proper support and every comment appears as an unconnected "re-toot" from the community "user."
I'm not an admin so I'm not sure If I can provide any more useful information, but the guys at https://forum.friendi.ca/profile/helpers in my experience would be excited to help troubleshoot such.