Could be.
FWIW, I own (1) a 2012 laptop from a Linux laptop vendor, (2) a 2017 laptop that came with (only) Linpus Lite OS preloaded, (3) a Microsoft Surface Go2 from which I’ve nuked Windows, and (4) a Dell micro from which I’ve nuked Windows. They all now run Linux Mint, and use grub to boot.
The 2017 formerly-Linpus laptop and the Dell do return a PK value, while the 2012 Linux laptop and the Surface Go2 return Variable PK has no entries.
But fortunately they aren’t listed among the affected machines.