NEST SEAT RESERVATION CRITERIA:

Candidates belonging to the reserved category are offered reservations in the admission process by NISER and CEBS. A certain percentage of seats are reserved for candidates belonging to SC/ ST, OBC-NCL, PwD and Supernumerary Quota for candidates who are from Jammu and Kashmir.

So there is no reservations for EWS category. You can visit the link provided below to know more regarding this:

https://university.careers360.com/articles/nest-eligibility-criteria#NEST-2021-Reservation-Criteria

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