See when you opt for EWS option then actually it mentioned as General-EWS. So its not exactly like SC/ST kind of a reservation. If you see your admit card well or the confirmation page well then you will find that its mentioned GEN-EWS.

For JEE MAINS revision plan you may visit the link below:

https://engineering.careers360.com/articles/jee-main-revision-plan

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