Fun fact: https://github.com/linuxboot/heads/issues/1885
Heads is working on ThinkPad T480 support, based on integration work done by Libreboot, which was in turn made possible by Mate Kukri @mkukri who did the coreboot port.
I like every coreboot distro, even *a certain project* which I don't name, but: I have a special affinity for the Heads project. They're great. This is the heads project: https://osresearch.net/
Heads is a coreboot distro using *Linux* as a payload with u-root and a bunch of security features.