Is ZorinOS 17.2 Core the only Linux distro you have tried?
Note Z17.3 will have a later kernel 6.11, when it is released by the devs Feb/March 2025. Ref: NVram Locked (Zorin not found in efibootmgr) - #14 by AZorin
Others on the forum should be able to assist with any kernel change if needed.