Matter support is available when running Homebridge v2.0+ with Matter enabled:
enableMatter: true (the default) uses Matter mode when the Matter runtime is available; the tunnel status is published as a Matter motion sensor endpoint.
enableMatter: false forces HAP mode; the tunnel status is published as a HomeKit occupancy sensor.
Tunnel behaviour is identical in both modes, and the plugin falls back to HAP automatically if Matter is unavailable.