I'm not sure why it would require an entirely different OS or some custom watch. You can make a widget on both watchOS and Wear OS to display this data.
As far as using a Huawei (2015) or LG (2014) watch as a daily driver in 2024, you'd be pretty let down by the speed and battery life compared to a current Galaxy Watch 6 or Apple Watch S9.
Good point. Don't know anything about hardware, nor am into wearables. It's good to always learn new things.
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