Sorry, You aren't eligible for NDA 2021 and not for NDA 2022 because you have crossed the eligibility. For NDA (1) 2021 the age limit is 16.5-19.5 & the date of birth criteria is July 2, 2002, to July 1, 2005.

You can visit the link below to know more about this:

https://competition.careers360.com/articles/nda-eligibility-criteria

I hope this answer helps. All the very best for your future endeavors!