H4 Visa stamping - dropbox - Mumbai IW

Has anybody been able to schedule a dropbox appointment in Mumbai IW for H4 visa stamping?
I am looking for an appointment during the week of 5th April. I have been trying for a month and dont see any open appointments in Mumbai. I see dropbox appointments open in all other location but not for Mumbai.

Are appointments slot opening up but I am missing the window and all appointments are taken up?

I would appreciate any feedback.

Thank you!