Hello Uttam ,

Jee main qualified students have to register in order to participate in the counselling procedure However the candidates who have qualified HPCE can directly sit in the counselling prrocedure and seat matrix is 50% for the Jee main candidates and rest 50% for the HPCET qualified students

Here I am sharing a link with you for more of you help

https://engineering.careers360.com/articles/hpcet-counselling

Hope this will help you in a good way and can ask for further clarification