New WEMO Switch will not show up in app. Have all below for years and working and semi stable. Bought this extra one now - same model as others. It completed setup,
WEMO Smart Light Switch F7C030FC B&H Photo Video
The First THREAD Light Switch! New WEMO Dimmer - Full Review! - YouTube
Belkin Wemo's new Smart Dimmer Switch with Thread is exclusively for Apple's HomeKit - The Verge