I think we just need more open ended posts. A lot are just "check out this blog post," which is super long and technical so little just nope out.
If most of your posts are like that, you'll get minimal engagement, and people with more "basic" questions may be intimidated to post.
So post some stuff like, "I went to do X in Rust, but the borrow checker isn't happy. Can someone explain what I'm doing wrong?" I think that'll drive some engagement and encourage others to post similar questions. I don't want this community to only be code reviews and whatnot, but a mix can help the community feel a bit less weighty.