As a newcomer, I've visited 3 Lemmy sites: Beehaw. Lemmy.world, and a custom instance. I noticed that they each have page footers that contain: Join Lemmy. If the same is true of many Lemmy instances, I can add Lemmy (or, with quotation marks, "Join Lemmy") in a Google query. — (Note: Top matches might not always be best matches on the originating instance, or sometimes the best matches might be hidden until I click "repeat the search with the omitted results included." And of course sometimes I won't get any match because the target hasn't been indexed by Google.)