See as per the notification, for EWS certificate in AP counselling you need to submit the certificate which is to be issued after 31st of March,2021. So you can't use this certificate which is issued before the date.

To know more about AP counselling visit the link below:

https://engineering.careers360.com/articles/ap-eamcet-counselling

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