As per the NEET PG Information Bulletin, there are no mentions regarding the date of the issue of the EWS certificate. See as its 2022, then it would be better for you to have a certificate issued after 1st April,2022. Now if you wish you can contact the help desk of the NEET PG and get it discussed they will guide you out.

The information bulletin for the NEET PG is provided below-

https://nbe.edu.in/IB/Information%20Bulletin%20NEET-PG%202022%20-%20Final%20Version%20for%20NBEMS%20Website.pdf

For the helpdesk consider the link below-

https://exam.natboard.edu.in/communication.php?page=main

For more information regarding NEET PG consider the link below:

https://medicine.careers360.com/exams/neet-pg

I hope this helps. Wish you a great eve!