Performance - dGPU - 3DMark Time Spy
Performance - Games - Radeon RX 6600M - 3DMark Time Spy
3DMark includes everything you need to benchmark your hardware. Time Spy is way more GPU-dependent, though. But still, a very representative title concerning PC gaming performance.
While not fair as a comparison, the Ryzen 9 6900HX actually has the best IGP we ever tested; ergo let's list it in between dedicated graphics cards as well: