I know of the “Search” feature at the bottom and the “Local” “All” feature at the top - where local refers to the server you logged into.

However, to discover new communities, I like listing all the communities of a server, select a community to list all the posts and then take a look whether some posts are interesting. I could see using this to find communities I would like to subscribe to.

Am I just blind or is this core feature missing? In the web version this can be done by selecting a server>communities>select a community>go through the posts.