I've just upgraded from a Gen 2 12.9" to this M1 and it's fabulous, much faster than my old iPad with ProCreate and LumaFusion. Trouble is, now I know I have all this power, I want to do more with it. I use Sketchup, Rhino, Revit, Microstation at work and I'd love to do something similar with the iPad. I already have Sketchup Viewer on the iPad and God knows, it's not a complicated program, would it be so difficult to build it out fully for iPad OS?
It comes down to return on investment by the developer - is it financially worth it to extend the functionality on the iPad? Will they make back the development and maintenance costs and make a profit? Given the demand for low cost by users on iPad apps coupled with Apple's tax, that can be a hard argument at times.