The Xiaomi 10s and Huawei watch can be connected, but there are some issues to note. First of all, make sure that both the Xiaomi 10s and Huawei Watch support Bluetooth 4.2 and above.
Second, you need to install the Huawei watch's supporting APP on the Xiaomi 10s, and connect it according to the APP's instructions. Finally, because the Xiaomi 10s and Huawei Watch come from different brands, there may be some compatibility issues, such as message push, sports data synchronization, and so on. Therefore, it is necessary to pay attention to whether any abnormal situation occurs during use.
This actually has little to do with hardware, mainly system problems. Apple's system is closed, so the Apple Watch can only connect to an iPhone. But Android, Xiaomi 10S as long as you download a Huawei sports APP can be connected.