No, from that display you cannot divine any more than that the airline is prepared to take reservations for 4 more first class seats, in any of those first class booking classes.

It literally means no more than that. It may be that the cabin is empty, but the maximum display is 4 seats. Or the cabin may be fully booked already, but the airline is prepared to overbook by another 4 seats. That's how little GDS displays tell you about the actual booking levels on a flight.