I’ve seen this mentioned a few times already: people wondering why certain communities don’t show up in their instance. You need to first search for that community via the magnifying glass icon and type in “!communityname@instance.domain”
Notice the exclamation mark at the beginning. Might take a few seconds. This will teach your instance about the remote community.
Jerboa also needs a lot of improvement with following links. Right now, if I click those links in your comment that are memes@lemmy.ml, my phone assumes they are email addresses and opens my email app.
Wait, they’re not e-mail addresses ? /s