There's unofficial support in the rocm-4.3.0 math-libs for gfx1030 (6800 / 6800 XT / 6900 XT). rocBLAS also includes gfx1010, gfx1011 and gfx1012 (5000 series). If you encounter any bugs in the {roc,hip}{BLAS,SPARSE,SOLVER,FFT} stack with those cards, file GitHub issues on the corresponding project.

I have not seen any problems with those cards in BLAS or SOLVER, though they don't get tested as much as the officially supported cards.

FWIW, I finally managed to buy an RX 6800 XT for my personal rig. I'll be following up on any issues found in the dense linear algebra stack on that card.

I work for AMD on ROCm, but all opinions are my own.