I don’t know if I need to do that because Vulkan seems to be working now but is that correct? My sources.list file is empty and it states the wrong version of Linux mint. Should I actually edit “/etc/apt/sources.list.d/official-package-repositories.list”, seeing that that has the actual list of repositories?
Yes but the problem for me was more complicated. Mesa is installed by default in Linux Mint and Vulkan should have worked out of the box but for some reason it defaulted to the wrong Kernel driver for the GPU. I didn’t know this before posting and, as I stated in other replies, every search result on every search engine told me the wrong information.