Same for all Linuxes, it’s a current limitation of the Linux kernel. There’s an open issue about it, essentially working out how to use the TPM to sign the memory dump so that secureboot will accept the signature and load it from disk.

Looking at Wikipedia now, Motorola Mobility is owned by Lenovo but still a US based company, so kinda the worst of both, no?

Isn’t Motorola still a US company though? How is this a move away from US tech?