Hi, let me add to this post that the problem reported is not exclusive to the RX 9000 series GPUs, it also happens with NVIDIA GPUs.
I own an RTX 5080 and it doesn’t work with PCI-E 5.0 ×8 on my GTI 13 ultra, only with PCI-E 4.0 ×8, so it’s definitely either a PC compatibility issue or the dock doesn’t support PCI-E 5.0 ×8. I’m gonna go, hopefully, with the former.
We really need a BIOS update in order to fix it.