H1b dropoff appointment for jun and july 2024

It seems all dropbox are now centrailized in Chennai consulate. Does anyone have a Jun or July dropbox appointment? I have been looking for one in the past 2 months, June and July has always been red. There was appointments for January through May. Although May is all taken now. I am curious if it was never opened up to be booked or it is all already taken for Jun and July.