I posted some stuff and ran into this plus my threads not getting federated to certain places. And 3 weeks later they are still the newest posts on those communities (Kbin's ps1graphics and blender communities, note that Kbin communities seem to not use the community link format).
I had some technical questions and a roadblock too, but they are niche so I just... didn't deal with it. Maybe there's an instance out there that'd fit (for me, someone who dabbles in art and programming while not really being those things), but also I doubt it particularly because I'm only interested in a semi-niche programming language. Audience vs niche seems like an unwinnable balance.
I've thought about posting to a more popular lemmy.world community for the next thing I make as it would probably get more of a response, but probably not answers so that wouldn't matter since the stuff I made so far was just random objects. Well, I guess getting answers for Blender questions is more likely.