Kubuntu was totally fine. I always use around 1.5x scaling on this res/ppi.
Integer scaling works fine (and is sharp) on both desktops.
There are no patches in this repo but actual driver kernel modules. I don't think any of them have been mainlined but I may be wrong. Whenever I update the kernel, I run a single script from that repo. But I don't update kernels unless there is good reason for my particular hardware.
I used the 5.17 kernel series until two weeks ago and switched to 6 since then. Everything works perfectly fine.
Feel free to PM me for any other questions about this machine.