https://codeberg.org/canoeboot/cbmk/commit/6577abc60aadc0f40a4b5dd2ad06f827b1dbd132
Canoeboot 25.06 RC1 coming soon!
Also I will now import and adapt Libreboot documentation for these added boards, and write a page explaining this change.
GNU FSDG-compliant Intel SandyBridge, IvyBridge and Haswell support is quite feasible, and has been for years. You can avoid flashing the Intel ME region, instead re-using what's already in the flash.
Canoeboot therefore does not provide Intel ME firmware. Everything else is fully 100% Free As In Freedom.