JEE

No, JEE mains paper 1 score is not required to get admission in National Forensic Sciences University for B.Tech+M.Tech CSE. National Forensic University hasn't any provision for taking admission based on JEE score. They have individual entrence test. On basis of the score in the entrance they admit the students. Seats are allocated to candidates based on merit and entrance score. National Forensic Science University course admission requires candidates to take the NFSU entrance test (or NFAT).

You can contact official to the JoSAA and nodal officer or there is awaiting certificate form you can fill and submit it for result delay.There is result awaiting form on which it is mentioned that:You result is not published you are filling the awaiting form for this.You are taking oath that If any think found fault in result i.e. less then 75% for OBC/general and less then 65% SC/ST then you admission will cancel.Admission is done on your risk and no one is responsible for any issue.

As per JoSAA, it is clearly mentioned that you are eligible for JEE advanced and Mains if you have 75 % from any recognised board. Hence you are eligible as you have 76%. 

Yes, one can get admission for B.Tech in Kerela with 52.95 percentile in Joint Entrance Examination (JEE)mains with state quota. To know more about the examination, admission process or other courses offered at Kerala, refer to the official websites or Shiksha.