Putting “company things” in quotes like you don’t believe people when they say Ubuntu has let them down…
Ubuntu is fine for very beginners, but don’t lie and say “it’s fine”, only to have any competent user discover very quickly that snaps take precedence over deb, snaps will be reenabled on minor release upgrades, even if you disabled them, ubuntu’s built-in NVIDIA install support has become abysmal, ubuntu has recently made the choice to fall out of step with its own supported DEs with regard to xorg support, etc.
You’ve just answered your ow question; back up the /etc directory should cover all those.