It looks like this is the first official mention of a Starship station.
Eric Berger also said:
To add a bit of context: A couple of years ago SpaceX considered working with one of the four current providers of commercial space stations for NASA. But when it came time to decide Musk pulled back, saying SpaceX needed to focus on getting Starship into orbit first.
At the time, IIRC, the speculation was that SpaceX really phoned in their Commercial LEO Destinations bid. Berger makes it sound like they might have withdrawn?