Welcome to the forum.
We have a thread you can follow about the car's release date. So far we're all just guessing.

2021 Nissan Z Release Date
When questioned about new Nissan Z's arrival, Ivan Espinosa, an executive in charge of product planning said we "can expect something soon" and that he "can’t share what but that doesn’t mean we’re not working on them. Nissan is about exciting cars." Its a big hint at the Z35 (380Z? 400Z?) being...
Probably later in 2021.