Woot or some other deal site had a Surface Go 1 (with LTE) on sale & figured I’d pick it up for fun. After doing a quick search, I came across the Linux Surface GitHub repo again & saw that even the LTE piece should work with a little modification. I usually jump between Ubuntu flavors (usually Xubuntu since it’s a bit lighter) & Linux Mint; this time I was Xubuntu.
Of course because I choose to not fully read things, I had missed the specific details the project has about enabling the LTE radio: GitHub: linux-surface: Wiki: Enabling the LTE modem.
This page was a huge help as well: Kepi.cz: Surface Go 2 and LTE modem (updated).