Can I replace stock UEFI with coreboot?

I’d like to get the most out of the battery life in the razer tensorbook. I already have several boot options I’ve created with NixOS, which blacklist the Nvidia driver for instance, which has helped a bit with battery life. However, I’d like to squeeze out as much battery life as possible by changing the UEFI to coreboot.

This article from 2020 with a proof of concept looks promising:

This is the Intel Icelake in a Razer Stealth