Lemfo LEM12 Pro

I bought lemfo lem 12 Pro on AliExpress I like it a lot but I tried the Wear OS application but it doesn’t associate

Version with additional battery

This is not a Wear OS Watch

So, even if it has an Android operating system, it’s not necessarily compatible with wear OS.

Wear OS (previously known as Android Wear) is a version of Google’s Android operating system designed for smartwatches and other wearables. … Wear OS supports Bluetooth, Wi-Fi, 3G, and LTE connectivity, as well as a range of features and applications.

So, These android watches are more like cell phones. They have different hardware than a Wear OS Watch. So the OS is specific for that hardware.