The navigation for mobile client will follow the same format as others. There'll be a top level section `Mobile Clients` Then as per the docs the sections underneath will show in as children links https://docs.google.com/document/d/1yYHZ8WEEDFiXQBR20cIYnMEQgChnarkCR0SxyHMiFPk/edit?ts=5b361974#heading=h.tnm4gaejoixg
Trello link