Sonoff Zigbee 3.0 Dongle Plus working as Router

Good night!

I have a Sonoff Zigbee 3.0 Dongle Plus which I would like to use as a Router. After flashing the router firmware, can it just be paired to my zigbee network through eWeLink app or do I need to add it to my zigbee network through HASS (ZHA or M2QTT)?

Thank you for the help!