Has anyone with the 2019 GA6 changed the transmission oil? Is it necessary to change it?

Replaced the gravity at 40,000 km, got it done for 500.

I haven't changed it, no need to change it.

It's almost 60,000 kilometers, feels very smooth, no need to change.

I changed it at 60,000 kilometers because it wasn't expensive. After changing it, I didn't feel much difference.