Hey Ansh, as you have mentioned for <50% marks only for maths, you will still have a chance as the minimum eligibility criteria of 75 percent or top 20th percentile in boards is only counted on aggregate so if you score good in Physics and Chemistry, the overall score surpasses 75 percent and your job is done.

Now coming to 92th percentile, this score in JEE Mains is decent, but might not fetch you a core branch at any NITs or GFTIs assuming you are from UR category and going for OS colleges. However you can research a bit on your preferences and get a lower branch for a govt. college.

However you may try applying for the CSAB counselling in your home state quota for the left out seats if in case you still are not able to fetch a seat.

You may try using the college predictor to find out the best colleges at your rank:

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

Hope it helps you, feel free to ask any query, thanks!