HomePod Mini and Thread Devices

Whats The secret to getting an actual Thread device connected? I’ve had two other Thread devices (a Nanoleaf Bulb and an Eve Motion Sensor) that I’ve had to return because I could never get them connected. My router supports ipv6, it’s enabled, HomePod Mini firmware up to date. I’m trying to connect an Arre Smart Button but it constantly fails to pair. I’m starting to think Thread isn’t actually a thing. All my other devices connect fine over WiFi.