What would be the best spyware free smart watch?

So I want te find the most feature rich smartwatch that doesn't send data to the manufacure. I have tried the Pinetime watch, but it died after 6 months.

Infinitytime (OS) was not realy that feature rish, so I want to secrufise an Open Source watch OS. But I still want to connect it with Open Source software, like gadged bridge.

What is my best option under €200? Maybe the Xioami Mi band 7 (€50) that is supported by gadgedbrigde?