GPU passthrough code 43 (unable to resolve)

I'm running an AMD laptop (ASUS ROG Strix G513QC with integrated AMD graphics and a dedicated NVIDIA GPU (RTX 3050). I had fixed the code 43 for a moment by disabling and re-enabling the driver but now that no longer works.

Followed https://www.reddit.com/r/homelab/comments/b5xpua/the_ultimate_beginners_guide_to_gpu_passthrough/

GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on textonly video=efifbff video=vesafbff"

root@vpj:/etc/default# cat /etc/modules
# /etc/modules...

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