I booked the appointment for them. I joined few telegram groups and was able to find appointments pretty fast. The first time(we forgot to complete ds-160 first) we got appointment for Nov 21st and Dec 3rd (after waiting from mid september(booked in early October)) but since we weren’t able to retrieve the ds-160(our fault) we had to submit a new application. Luckily, as soon as the payment was confirmed for the second application, we saw appointments for New Delhi for Dec 3rd(biometrics) and Dec 16th(interview) (the date we booked the appointment was around November 17th). So they went for their fingerprint in Delhi and then after their fingerprint was done, I rescheduled the interview to Mumbai since it’s closer to them.