Barely any of the watches (besides google & Apple Watch) are accepted as actual data in Pokemon GO. You can complain about it towards FitBit (though, they should've already added some kind of integration with google fit already) but this is NOT their fault. Please do your research first which data is being accepted by Adventure Sync. It has yes, but it's because of that and them wanting to promote the use of the Pokemon Go Plus that they've removed the Apple Watch app and why they're very unlikely to support an app for the Galaxy Wearables in the future.

Niantic ได้ชี้แจงเหตุผลการเลิกสนับสนุนเกม Pokémon GO บน Apple Watch ว่า ทีมพัฒนาต้องการโฟกัสการสร้าง Adventure Sync มากกว่าการพัฒนาแยกสนับสนุนตาม ...