Use Find Any File! contextual menu. no need to disable SIP etc.
might need to enable root by holding option key when pressing find button.
make sure invisible items = are shown
use contextual menu right click on the system extension to remove and try move to trash first. if that does not work, choose delete immediately. make sure you have it backed up in case you delete the wrong one, etc.
AVOID ALL THE HASSLE OF disabling SIP etc use findanyfile! (this works on version 2.4, Ventura at least).
cheers!