What analogues of libreboot do you know? What else, besides the BIOS, is vulnerable in lenovo laptops?

Question

linux

Hello gentlemen.
I own a thinkpad laptop. And earlier on Habré I saw that some bookmarks were found in the BIOS. It seems from Komodo sewn by the manufacturer. The news was old, I didn’t google it, but I remember. In this connection, I decided to update the BIOS. Today I read about ibreboot, but it does not seem to be compatible with x220i, according to the Compatibility list page on the office. site. So, are there any open source bios alternatives, analogues of this libreboot? What other bookmarks are known in thinkpad notebooks that can be closed? I will be grateful for advice.