Hey Ayush!

There would not be any problem even if your graduation results come after the date of NIMCET examination. The eligibility criteria of the NIMCET examination clearly states that the applicants who are in the last year of their bachelor’s programme are also eligible to apply for the exam and there won't be any problems in their application. However, the candidates must provide their proof or certificate of passing latest by September 15, 2020. So, even if your graduation results come by the end of July you can apply for NIMCET and give the certificate or proof of passing your graduation degree by September which would be available to you by then. Also, the  candidates who have completed or are completing their B.Sc./ B.Sc. (Hons)/BCA/ BIT course from Open Universities are also eligible to apply provided the programme is approved by UGC / AICTE and Distance Education Council (DEC) of Govt. of India.

Hope this helps you.