Ventura not able to switch to dedicated GPU, some apps still can use it tho

It's showing the iGPU, not dGPU

I have a dying RX 580 that works until the VRAM doesn't want to, so I switched to displaying through the iGPU for more stability and no crashes.

Problem is, I would love to use the dGPU for processing and the iGPU mainly for displaying and keep the OS from crashing randomly, is that possible? Cause the "automatic GPU switching" setting doesn't appear to me and the OS doesn't want to acknowledge that it is there even though apps like Blender and Resolve can clearly use it for processing.

Btw I'm using the iMac 18,1 SMBIOS, switched from 18,3, and the CPU is the i7 7700.

If somebody knows how to do this it would be great, but if it ain't really possible I'll just have to get used to a bit slower system.