While there has been the Apple System Management Controller "SMC" hardware monitoring driver with the intent on exposing battery/power stats as well as thermal and more for Apple Silicon SoCs on Linux, it hasn't yet been working out properly on the mainline kernel. Between missing Device Tree nodes to the hodgepodge mess of sensors between the different Apple M-Series SoCs, it's a mess...
A month ago there was a change proposal raised for offering a "light" version of the GRUB2 bootloader for use in confidential computing environments. While there were some differing views on the matter for this alternative, stripped-down GRUB package as opposed to just using other bootloaders like systemd-boot, ultimately, the proposal is now approved...