The FCC has published a new listing for an unreleased Amazfit smartwatch. Referred to as model A2170, the smartwatch appears to be the rumoured next-generation T-Rex Pro, thought to be called the T-Rex Pro 2 or the T-Rex 2 Pro.
https://www.notebookcheck.net/Amazfit-T-Rex-Pro-2-FCC-listing-confirms-design-battery-capacity-and-display-style.616556.0.html
I have the T-Rex Pro and it has something that Apple, FitBit or Samsung etc. do not. It withstands repeated knocks against Door Handles, Door Frames, Walls, etc. Besides G-Shocks, it is the only watch I have not damaged. For me this is is it's best feature.