Modern graphics processors have thousands upon thousands of shader processors, and that’s because they’re expected to run intense 3D games and do massively-parallel math. You don’t typically expect integrated graphics processors to do those things, so that’s why they’re much smaller, and they don’t get any littler than the single-WGP GPU built

Source: Hot Hardware – AMD Ryzen 7000’s RDNA 2 Shows A Massive Performance Gain When Overclocked To 3.1GHz