F-2 dependent visa appointment

Hello Guys,
I am not getting appointment for my spouse in October, Initially when I was looking for interview Appointment in New Delhi, I saw the date right next day 23 september, 24 september, 25 september, 23 september. After that I am seeing the appointment for 22 January 2022 now. Why it is taking so long suddenly. Do you have any Idea.
Thank you