I believe they only have their custom bios and no word on coreboot support. Rumors are that they recently hired someone to work on getting coreboot working, but until framework themselves say something we wont know.
I'm having a Framework 16 and chose during ordering to set it up with coreboot
Not sure about libreBoot, and haven't really looked much into coreboot as well, to be honest, but everything seems to work and I'm happy
Edit: nah, I think, I've talked shit and remembered it wrong.
Seems framework currently doesn't give the option to use coreboot.
Sorry for the misinformation...
have you looked at the dells? i think i'm going to get one for work and their specs suggests that it's compatible.
short of buying a linux laptop from a linux maker with it's own disto and it's own developers to maintain it; there's no other guaranteed way know (afaik) if they're compatible ahead of time if no one has had already tried it and shared their results online.
questions like yours is the reason why i bought that kind of laptop five years ago and the sailing has been so smooth ever since that i now think i need to get a new laptop so that i can understand what choppy waters looks like nowadays with a windows only laptop and trying to get everything to work on it; like i did when i was first learning linux. and dell seems likely to me.