I have an Air and an iPad Pro. What I want is it to be the same device, ie detachable screen that is the iPad, like a Surface from MS, but with Apple design lan

I have an Air and an iPad Pro. What I want is it to be the same device, ie detachable screen that is the iPad, like a Surface from MS, but with Apple design language and macOS. Apple do that. Take my money and everyone else’s pretty quickly.