?? OPAL is transparent to the OS, Microsoft doesn't need to see/care about it. I'm multi-booting Win11, Linux and GhostBSD on my OPAL2 encrypted drive (on a ThinkPad Z13) and I've got zero issues.

They're talking about Windows Bitlocker. It used to be able to use hardware encryption if the drive supported it, then there were sufficient vulnerabilities in implementations that it now always does software encryption.