Hello, Aspirant. In the question, you mentioned you are from Uttar Pradesh and you have secured 74 percentile in JEE Mains April Session. If I am not wrong your rank should lie within the range of 265980 - 299000.

You showed interest in getting admission at AITH, Kanpur. If you visit the institute's official website, they have clearly mentioned that candidates who seek admission to AITH must attempt UPSEE (conducted by AKTU) and on the basis of that score counselling processes will be conducted.

If you want to get admission in IERT, Allahabad then I suggest you try for cracking UPSEE with a better percentile/marks or sit for the next session of JEE Mains. It is less likely for you to get chance in IERT, Allahabad with 74 percentile.

Regarding admission to IET, Lucknow , the college authority has published a notice recently which you can follow: https://www.ietlucknow.ac.in/admin/2425

Lastly, in order to take admission in KNIT, Sultanpur , as far as I know you can only get admission if you clear UPSEE (conducted by AKTU). Visit their  official website to know about admission processes in details.

If you want to know your chances of getting admission in various colleges based on your percentile or rank, then feel free to check out JEE Main College Predictor and UPSEE B.Tech College Predictor .

I hope all this information are enough for you to clear your doubts.

Thank you and all the best for your future.