What's still visible is the available inventory (which is what is needed as one could not do spontaneous (re)bookings otherwise).
For all travel classes with at least 9 available seats one would need the seatmap to do a more detailed analytics and that's what a lot of airlines have disabled so that others can no longer see how much more than 9 seats have flown empty or by how many seats a single flight in a specific travel class got overbooked.
For First and Business class this is still often still available as it doesn't matter that much than for Premium Economy and Economy.