https://www.amd.com/en/resources/support-articles/faqs/GPU-N4XCSM.html
..To fully leverage the benefits of UEFI, only UEFI Mode will be officially supported starting from the AMD RDNA™ 4 generation of graphics cards (Radeon™ RX 9000 Series Graphics and later)…
* Are the Radeon™ RX 9000 Series restricted to Widows 11 ?