Installed macOS Sequoia yesterday, graphics stopped working after a restart today

They worked absolutely fine yesterday, then I shut it down and booted it up today and suddenly I have no graphics drivers.

I seemed to have fixed the issue but I just wanted to confirm if this is the right way to do it, and if anybody might be aware of why this could have happened in the first place?

I opened the OpenCore-Patcher app > Post-Install root patch > revert root patches > reboot.
After the reboot I automatically got prompted to install the root patches, which I did. Everything seems to be in order by the looks of it, but I'd just rather be safe than sorry so I thought I might ask here.

Specs:
iMac Retina 4K, 21.5-inch, Late 2015
macOS Sequoia