I’ve made it work on arch, debian and fedora, on a T420s, T480s, T14 AMD, MBPr 2012, each on luks2 + btrfs with systemd-boot, and it works flawlessly on all of them. the setup is super-involved and cumbersome though but it’s easily accomplished once you get the hang of it.
the links posted here along with the arch wiki is what I used. it helps if it’s not your primary and only device, so you have time to retry until you get it right.