NX300 Transmission Fluid

Bought a used NX300 2021 with 53k Miles. Put in about 1000 miles this past month and its been good! I am not sure if the transmission fluid was ever changed for this car and based on the manual it never asks for it?? Should I still change it? Only Fluids I see it asks for in the manual is Oil and Brake Fluid. It doesn't even say which Transmission Fluid to use.

The manual states the following: "The transmission and transmission fluid are a completely sealed unit. Therefore, periodic checks and replacement of the transmission fluid are not required, and there is no dipstick on the transmission."

Also it only says Oil Change is required every 10k Miles... is that too long? Brake Fluid it says every 30k.

Thanks,