Hello aspirant

Hope you are doing great there . I don't think that the no. of candidates appearing from a particular state say UP  is revealed by the national testing agency , But yes the data of the total no. of candidates is definitely revealed along with the no. of students from a particular category like general , ews , sc , st is definitely dictated .

A total of about 22 lakh candidates appeared for JEE mains 2021.

I hope my answer helps

Wish you all the very best!