When I was looking into this for current hardware it seemed impossible. I gave up after realizing even System 76 has gone proprietary with their boot loader implementation, especially with their towers which are based on commercially available hardware. It is really shitty theft of ownership bullshit IMO. Maybe check in with Leah Rowe at Libreboot and see if she has any ideas.

probably not, coreboot only really supports old (<7th gen intel) platforms.

here's a list of working platforms if you're curious:

https://www.coreboot.org/status/board-status.html

AMD platform support is coming to coreboot in the next few years, consumer platforms much later and even there I'm doubtful it'd come to your laptop in particular.

Get a Frame.work with Intel chip if you want coreboot on a modern laptop soon-ish. I know the guy working on that port ;)