AMD Radeon RX 6500, a lower-end RX 6500 XT, has now been confirmed by a Chinese AIB. The board has a low power requirement, as it features an RDNA 2 Navi 24 GPU like the RX 6500 XT.https://www.notebookcheck.net/Compact-Radeon-RX-6500-debuts-with-Navi-24-RDNA-2-GPU-doesn-t-need-external-power.1002816.0.html
Current iGPU have roughly the same performance or even better, but for upgrading a very old system with a mediocre PSU, it might be a good catch.