True, and the same happens here on kbin.social. However, in the case where there isn't a link to automatically do the search for you, I still think it'd be helpful to have something more intuitive than the community only appearing when the exact address is put in the general search bar.
EDIT: To give an example where this would be useful, what if you're someone on a newer Kbin instance and want to add an existing community? You'll have to know the method of doing it, and if you don't, you're out of luck. Having a dedicated button and interface for this would make it much more intuitive. When I saw PieFed's "Add Remote" button, I immediately got what it did, whereas I still have no clue how to make Kbin communities visible on most Lemmy instances.