I’ve been doing this for a long while now, here’s one of the most complete writeups I did last year: https://taoofmac.com/space/blog/2022/10/23/1700
TL;DR: install xorgxrdp-glamor and make sure you are using the Xorg session in xrdp-sesman.
It is almost as fast as GPU-accelerated RDP in Windows, although that relies on deeper acceleration support (I have notes on that here: https://taoofmac.com/space/protocols/rdp )
A big concern I have right now is that Wayland is nowhere near as useful for multi-user RDP access (it doesn’t even seem to support offscreen GPU accelerated rendering, but that may just be my testing on Fedora).