For these Android 10 / Full Android smartwatches, my understanding is that the supply chain is as follows:
Starts with a solution provider that creates the printed circuit board assembly and firmware. For nearly all of these watches it is a company called Wiite. Their website is:
Then factories buy these base solutions and create the watches. There are 3 or 4 of these factories. I have heard of KingWear and Ledai. I believe there are a couple more.
These factories sell to the brands. That is why you will see multiple brands with identical watches.
These Android 10 watches currently all use the same mainboard with a MediaTek Helio P22 MT6762 processor, 4GB Ram and 64GB of storage. Same basic watch, different case / cameras and tweaks to the firmware.
I have a Zeblaze Thor 6. Based on this the board is made by Wiite? Do you know which factory produces the Zeblaze?