An earlier leak suggested that the increasingly popular wearables brand Amazfit had a second-gen GTR smartwatch in the works. Now, a device of this name has been approved to use Bluetooth 5.0. Therefore, it may not be far away from an official unveiling.
https://www.notebookcheck.net/The-Amazfit-GTR-2-takes-a-trip-to-the-Bluetooth-SIG-possibly-confirming-it-will-launch-soon.493501.0.html