Z 6II TIFF format selection missing - please help

If you search for EXIFTOOL you'll find the free version from Phil Harvey. It will do a command line operation to change the camera name on a whole batch of *.NEF files. Adobe will eventually add the Z6 2 and Z7 2 cameras. The idea of renaming back to the name without the "ii" is how you can bring in files to editors. Save the originals but it should be a close enough change to work quite well. The sensors are the same and it's mostly a processor issue where the ii cameras now have double processors. Save off all images unchanged until we can confirm the new camera profile is either the same or different and allow you a "do over" if worth it.