I don’t know who develops wayland. I don’t think it depends purely on opensuse since the kind of problem I find also in several other distributions, let’s say in all of them.
On a full hd 2k monitor all smooth, wayland has no problems.
On a 4k super hd monitor with nvidia phoneix RTX 3050 graphics card there are lags. The mouse does not run smoothly but has lags, slowdowns. I would like to report this to wayland developers but I don’t know how to contact them.
I still can’t use wayland because of this problem which doesn’t exist on xorg.
You apparently misunderstand what Wayland is. Wayland is a collection of protocols between display client and display server (Wayland compositor). Unless you have evidence that protocols themselves are inefficient and inherently cause lag, the correct place to report is the bug tracker of the Wayland compositor that you are using. Which would be Mutter in GNOME, KWin in KDE, etc.
Yes, ideally things that should have been disclosed in your opening post. Anyway, NVIDIA is known to have some issues with desktop environments using the Wayland protocol. The environment variable you set (as a workaround) will only work for KDE. There are numerous bug reports discussing various issues associated with the nvidia driver. The NVIDIA forum is full of such discussions…