Funny, I tried to switch to PopOS a few months ago and my Ethernet card would just not work. I switched over to tether from my phone but after installing a few drivers and it not working I switched back to Ubuntu which just works with my Ethernet card (though I have to install a different driver to get gigabit speeds.) Really not sure what the issue was but I didn’t feel like doing a deep dive when every distro I’ve used in the past decade has had no problems with Ethernet cards on first boot.