I don’t have experience with MSI recently, but I’d be really surprised if you couldn’t flash a new BIOS off the system partition or FAT32 USB. You may not be able to update from Linux directly, but almost all motherboards I’ve seen support doing it from the BIOS interface.
You are getting this from Xwayland, so you’re running a rootless X server in the background. It’s nice that it works seamlessly, but it’s not really Wayland doing anything but managing the X window.