Been playing with efibootmgr tonight as Solus had disappeared from the boot menu (F12) of my Gigabyte machine and I could only boot into Win 11.
A bit of googling well Duck Duck Go, and I came across a tutorial page on efibootmgr which I found was on the Live Solus ISO and was able to restore the Solus bootloader to my UEFI boot menu. Handy.