F1 unmarried son visa status

hi12345

Registered Users (C)
My unmarried son is in India and his DQ date is 8/2020. Waiting for an Interview for an F1 category visa at Mumbai consulate (unmarried son sponsored by citizen father). Do we know when will he get his interview? It's going to be 2 years soon since the documents have been submitted. Does anyone know WhatsApp or a telegram group for an F1 immigration visa? Any input is appreciated.
 
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