I think it would be better to just continue to improve iPadOS on the iPad. Macs run macOS, and macOS is desktop optimized. It shouldn’t have large touch optimized buttons. With the iPad on the other hand, iPadOS is fully designed and optimized for those interactions. As Apple continues to improve iPadOS and the softwares converge, they can have the best of both worlds by preserving both. For those who want a touchscreen experience, they have the iPad, for those who prefer a desktop system with a trackpad and keyboard, they have the Mac.
From consumer point, this "looks" great, but it is more economical and capable to introduce touch to the MacOS. Microsoft in that way took the more wiser path, Apple still seem to struggle.
In a meeting the touch screen I find massively useful to explain, discuss matters much effectively. It feels and acts much natural, and so much more effective than using the mouse/touch-pad.
When I am using the Macbook, people try to touch the screen to explain/discuss anyway. So the part of the HCI already speaks for itself.
I've already created my case and sent to the Apple teams about this matter. Many of the people I know have agreed to the same - especially because of the natural feeling and the environment aspect as I mentioned above in my comment.
It may feel tricky to agree to such notion. But if you give up all the ego, and bias, you will really realise that it is the right thing to do - get the touch (the marvelous implementation of touch screen and the Apple Pencil capability!) onto the MacBook!! It is more simple, effective, economic AND environmentally friendlier !!
PS: I noted your repository
https://github.com/KalCadle/iPadOS-Home-Screen-Folders-Files-Icons
That's great work by the way. You might be feeling threatened by my comment. But I didn't mean to aim at your project (actually I'm a fan of the idea already, if you see I've thumbed up that). My standing I'd like to keep it unbiased, and from the perspective of the common people's economy and the environment-frienliness.
If we are to go iOS path, then it needs to made more developer friendly. At the moment too restrictive! Given the MacOS freedom the developers have (quite close to the super-large Linux ecosystem!) it is more preferable by the many.