One of the smaller quality of life improvements in 0.18.1 is now lemmy-ui will look for text that looks like a community like !community@instance.com and automatically links it to your instance’s community page for ez subscribing.

So if you just type in a post or comment !community@instance.com it will link to https://beehaw.org/c/community@instance.com when you post it.

If curious, here is the change request that added this feature. https://github.com/LemmyNet/lemmy-ui/pull/1462