https://www.phoronix.com/forums/forum/linux-graphics-x-org-d...
And I'm on Linux Mint 21.3 and so how to change any instillation script to think that Mint is Ubuntu to get that to maybe work there but there's no how-to for Mint like the one that AMD provides for Ubuntu! And really that's compiled By AMD for the specific Linux Kernel so not any DKMS sort of methods there AFAIK! but I'm no Linux Expert and just want some one-click install or that to ship with the Distro already working so Blender 3D's iGPU/dGPU accelerated Cycles rendering is possible on AMD Radeon consumer GPUs.
You've already got an amdgpu driver in your kernel. Possibly an old one but it'll be there. ROCm is userspace.
CUDA PTX is that Intermediate Language representation that's portable for cross platform usage but I'm not exactly sure how that is implemented for Blender 3.0/later.
P.S I have Ryzen 3000/Zen+ series APUs and Vega Integrated Graphics on 2 systems and the laptop has Ryzen 3550H/Vega 8CU iGPU and Polaris Radeon RX560X dGPU while the Mini Desktop PC has Ryzen 3400G/Vega 11CU iGPU only.