Help getting hardware acceleration to work or know if it is working on late 2015 iMac I used OCLP to install Sequoia on

I recently used OpenCore Legacy Patcher to 'update' a late 2015 iMac to Sequoia. Personally I have no idea what I'm doing and managed to make it work by stumbling through with the OpenCore Legacy Patcher documentation and a YouTube tutorial. I have basically no technical experience, and and I want to learn how to actually be somewhat knowlegdable instead of heavily relying on tutorials and whatnot. can someone point me in the right direction? My current goal is to try getting hardware acceleration to work on my mac, at least some help on that would be greatly appreciated.