Hello,
Your relative most probably has got the rank around 40k-70k which is not very high. His chances of getting any institute through JoSAA is highly unlikely. It would have been appreciable if you had also mentioned your home state eligibility. As with Home state in some of the states, you might have some chance in any north-eastern NITs. I would highly recommend you to look for some other options like some good private institutions or state counsellings where JEE Mains is accepted.
I am linking cutoffs for different IIITs https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits
Thank You
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