Right now, not really.
This was also an issue on reddit tbh - several subreddits would spring up for multiple topics, like how there was r/gaming and r/games. Over time, I'm sure some instances will become the "default" for a given topic, and others will become defunct. Imo, this is a good thing. It's a pretty healthy way to grow communities and avoid lemmy.ml dominating every topic.
We do now! I think it'd certainly fit with the niche communities we've made so far. No content yet, but feel free to post some stuff: https://possumpat.io/c/possums