Having been in the app development game for a long time, I know the feeling but have also learned to realize that this is actually not a negative; it means there's a strong signal that there's a desire for 3D apps on these touch devices. Competition can be really good. And your app has the ability to be more focused vs a legacy app that has to please a very large user-base who've come to expect it to behave a certain way.
Well, funny enough I'm actually working on a visionOS sculpting app at the moment! It's metaballs based, and kind of a different vibe / niche than what you're going for.
Eg, more like a sketch than asset production, and metaballs-focused which obviously is going to create a very different topology than NURBS, etc.
My first app was Polychord for iPad which is a music making app that came out in 2010.
These days Vibescape for visionOS is a big one for me, and there are others. I also worked in the corporate world for about a decade working on apps at Google, etc.
