Among consumer cards, latest ROCm supports only RDNA 3 and RDNA 4 (RX 7000 and RX 9000 series). Most stuff will run on a slightly older version for now, so you can get away with RDNA 2 (6000 series).
I have a Radeon RX 6800 and on my system, I use ROCm's OpenCL for some stuff and HIP for blender cycles rendering. If ROCm were to drop support for my card, that'd be a huge bummer.
