Fitpro LH719

I ordered this watch from Wish.
https://www.wish.com/product/5f27b374a05673462e153e39
The instructions said it needed a charging cable but that is incorrect, as this watch charges from a standard USB port.
After charging it I found the QR code on the watch.
I scanned the QR code and installed the app on my Samsung SM-A105G
I gave the app all the permissions it asked for.
I used the app to connect to the watch.
The app detected the watch and started connection, but then said "device disconnected" and did not set the time on the watch or do anything useful.
I tried again and again. I reset the watch. I uninstalled and reinstalled the app. It will not finish connecting to the watch.
It will not connect, it just keeps saying "device disconnected"

Видео Fitpro LH719 канала Darren Gedye