Increase the UMA size to 32GB

Hi,

I have a Ryzen 8700G on an MSI Pro B650-S Wifi board. How can one increase the UMA vram to 32GB. The maximum it shows on the UEFI BIOS screen is 16G.

Why 32GB UMA: Then one can use ROCm and gets a 32GB graphics card for running inferencing servers (LLMs)

Another question: Can this dedicated UMA vram be increased further if the system has more memory?