There are a lot of communities that were created in the last week but never had any kind of interaction or their mods never started to post to attract people (they don’t even have rules or a description).
Will there be some kind of cleanup or will it stay there until someone asks to take over it?
I don’t know that empty communities matter that much. If something’s a niche interest, having a community at all seems more likely to encourage discussion. And asking people to start shouting into the void is a moderate-to-large ask. My local subreddit has 22K members, and took since 2011 to do that. It may be a little while before anyone else comes along, let alone comes along with something to talk about.
Also, while I have you here, there is no good reason to turn off ctrl-clicking opening a new tab.