Had Umake 3D on my iPad Pro quite a while ago. But I wouldn't recommend
it to anyone. At first it looks interesting because it allows sketching in 3D.
It's a bit like Vector graphics in 3D.
But the handling of the Tools, sorry. This made me quickly
cancel my subscription again.
For me Nomad Sculpt (no subscription) is a good one.
Mesh based, 3D app on the iPad. The only one
I have left on my iPad. Btw. you can do a few things
more with Nomad than sculpting.
Here a link to ilya Tulyakov´s youtube channel
a great Modeller which use Nomad Sculpt.
https://www.youtube.com/@RaZuMsinc/videos
Meanwhile, there is also Sketchup on the iPad.
I think Shape3D is a pro one, but expensive.
Other than that, 3D apps that run in the browser
remained to use on the iPad.
But apart from that all, data exchange from the Ipad
to the computer is in my eyes the biggest problem.
Especially if you have a PC.
With a Mac it might be a bit easier.