Meizu comes up with this list extremely late, but after all it is better late than never. Registrations for the Nougat beta program will close on July 2 so until the final build shows up it might take at least a few extra weeks.
https://www.notebookcheck.net/Meizu-reveals-list-of-devices-to-get-Nougat.230388.0.html
Flyme 6 was announced, what about a year ago and still hasn't come out of beta, but they're announcing the next one?
I really hope they're doing it because they're about finished with 6, not because they feel a pressure to say something regarding 7.