Do you assume that it working means official support? I had been under the impression that RDNA had unofficial ROCm support.
Looks like on Linux the only GPUs which are currently officially supported are the 7900 series.
https://rocm.docs.amd.com/projects/install-on-windows/en/lat...
On Windows the official support covers most (all?) of the discrete desktop 7000 and 6000 series.
[1]: https://rocm.docs.amd.com/projects/install-on-linux/en/docs-...
Seeing this, I am not surprised I misremembered the state of RDNA support in ROCm. The support matrix it pitiful compared to Nvidia’s CUDA support matrix.
Debian has a particularly good compatibility story. Its ROCm packages carry patches to work on all discrete Vega, RDNA 1, RDNA 2 and RDNA 3 GPUs. That's not official support, but it is tested.