Hello Aspirant,

B.Arch. course is offered in few NITs but not in IIITs. So if you wan to pursue B.Arch. then you can pursue it from any of the enlisted NITs using  JEE-Main paper 2A score :-

Malaviya National Institute of Technology Jaipur

Maulana Azad National Institute of Technology Bhopal

National Institute of Technology Calicut

National Institute of Technology Hamirpur

National Institute of Technology Patna

National Institute of Technology Raipur

National Institute of Technology, Rourkela

National Institute of Technology, Tiruchirappalli

Visvesvaraya National Institute of Technology, Nagpur

Indian Institute of Engineering Science and Technology, Shibpur

If you are targeting for JEE-Main 2022 you can also take JEE-Main Learning package for solving series of mock tests :-

https://learn.careers360.com/knockout-jee-main-april-one-month-subscription/?icn=jee-main-knockout&ici=c360-clevertap-sticky-articles-web

I hope this information helps you.

Good Luck!!