I noticed about drag and drop using a touchscreen has been fixed in Ubuntu 24.04.2 and Ubuntu 25.04 Daily build.
Yes, that includes hold an right click option thing where you can copy/cut and paste, were I can no longer have to hold a finger and use a thumb at the same time, which it’s a good news for tablet users.
The only problem for Wayland is that selecting more than 1 files in a desktop background is still not working, but drag and drop one of them is fixed.