I haven't been posting / commenting as much recently because I've been busy with life stuff, but I do like seeing the posts (ex. I enjoy seeing the Lego posts). It would be nice to have more comments, but otherwise I usually upvote or save the post
One thing I've noticed is that even on Reddit, there are more posts with lots of upvotes and no comments. I'm not sure why that is
I'm planning to get posting again, but what I've found is that a lot of posts in the niche communities didn't go anywhere. Then every now and then a post takes off and a lot of people see it.
Best is when other people start posting too (ex. !publichealth ). I guess it takes time for an active contributor with similar interests to find the community, since others might not encounter enough content outside of Lemmy to post them