No, the Nikon Z9 is not compatible with the Sony SF-G Tough 128GB.
Nikon Z9 has no SD slot. Both slots accept only CFexpress Type B and XQD cards. Sony SF-G Tough is an SD card and cannot be used in the Z9.
What works instead
See all compatible camera for the Nikon Z9 →“The camera can be used with CFexpress (Type B) and XQD”
Last verified:
Confidence: inferred