The RK3588 is not your average retro chip. With four Cortex-A76 cores, four Cortex-A55 cores, a Mali-G610 MP4 GPU, and a 6 TOPS NPU, it is overkill for anything below PS2. Theoretically, it runs:
using the Vulkan backend, maintaining 50–60 FPS in demanding titles like Dragon Ball Z Budokai Tenkaichi 3 Advanced Systems emuelec+rk3588+link