There is https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/766 upstream already.

But this will not be sufficient, NVIDIA driver series 495 requires a rebase of Mesa as you noted, but also egl-wayland 1.1.9 which requires libglvnd 1.3.4.

For GBM with NVIDIA driver series 495 to work with GNOME Shell, it will also require 

All that to say that's a lot of changes for Fedora 34, so even if Xwayland is actually a simple change, it would be enough, far from it, so Fedora 35 would be a better target for this.

> For GBM with NVIDIA driver series 495 to work with GNOME Shell, it will also require 

Sorry, I posted the comment but I didn't finish that sentence, it will also require https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2052

I have upgrade to Fedora 35.

And compiled required packages with the patches for Xwayland and Mutter.

FEDORA-2021-78b54303ff has been submitted as an update to Fedora 35. https://bodhi.fedoraproject.org/updates/FEDORA-2021-78b54303ff

FEDORA-2021-78b54303ff has been pushed to the Fedora 35 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-78b54303ff`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2021-78b54303ff

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Transport fever 2 run on Wayland with latest Mutter,mutter-41.0-4.fc35.x86_64 and Nvidia 495 GBM.

FEDORA-2021-78b54303ff has been pushed to the Fedora 35 stable repository.
If problem still persists, please make note of it in this bug report.