The new Nikon FTZ II lens adapter (F-mount to Z-mount) seems to be just a smaller version (without the built-in tripod mount) of the already existing FTZ adapter in order to fit with the Nikon Z9 grip design. I am not sure why Nikon USA lists the FTZ II to be compatible only with the Z9:
Update – nikon.com lists both FTZ and FTZ II adapters as identical, compatible for all Z cameras.
| Nikon FTZ | Nikon FTZ II | |
  |
  |
|
| Supported cameras | All Nikon Z cameras | Only Nikon Z9 camera |
| Dimensions | 70 mm x 80 mm | 70 mm x 70 mm |
| Weight | 135 g (4.8 oz) | 125 g (4.5 oz) |
| Supplied Accessories |
Body cap BF-1B |
Body cap BF-1B Rear cap LF-N1 |
| Price | $249.95 | $249.95 |
