Use the PyTorch Nightly build. The ROCm libraries themselves have been built for the RX 7600 (gfx1102) since ROCm 5.4/5.5, but PyTorch itself wasn't enabled until a few weeks ago. The RX 7600 is still not 'officially supported' on Linux, but I have an RX 7600 XT and I haven't encountered any issues in my (admittedly intermittent) use of the card in AI applications. You may, however, find the 8GB of VRAM in the non-XT version to be a limitation.