I had posted this a few months and it's still the same issue.
If I search for a community using sync it only shows around 6-7. And that is also in the explore bar, it doesn't do the search in the dedicated search page.
Am I doing something wrong or is this still the case?
Well using a different app or site to just search for communities is a pain.
So if you search for memes, there's only 7 results in the results section. If you do that on the site you mentioned or in boost or something you'll bet like a lot more communities.
For example, look at how many results there are in results, the ones above are subscribed ones.