IIIT

Yeah you can get ECE in NIT Mizoram and EEE in NIT Nagaland, and CSE in IIIT Manipur. The best option I can recommend here is ECE from NIT Mizoram.

A JEE Main rank of 98,326, you may have a chance to get admission into newer IIITs or those with less competitive branches through JoSAA or CSAB counselling, especially if you belong to a reserved category or have a home state quota advantage.

With a 1,27,245 rank in OBC-NCL, getting CSE in any NIT or IIIT is very difficult. CSE seats usually close much earlier. You might get other branches in newer NITs or IIITs. Keep an eye on spot rounds or consider private colleges if you're focused on CSE.

With EWS rank of 68741 and CRL rank of 515714 you can not get a IIIT however you can get NITs like NIT Patna NIT Durgapur NIT Mizoram NIT Sikkim NIT Raipur and NIT Goa because they have relatively lower cutoffs than Top NITs like NIT Trichy, Warangal, and NIT Srinagar and NIT Bhopal. You can also look for government funded technical institute like Assam University Pudducherry Technological University.