As a follow up to our previous announcement post, we have now set up a page to display every community that is hidden for our local users.

As explained on that page:

Programming.dev will hide political communities, NSFW/pornographic communities and communities that have a majority of their content produced by bots. While a community is hidden, it and its posts and comments will not show up in post feeds or in the search results unless you have explicitly subscribed to it. Communities themselves currently do not show up in community search results, this may change in the future; see #2943.

Users can subscribe to a hidden community to remove the hidden effect status of a community, however it can be difficult for a user to find out which communities are due to them not being searchable.