Hello aspirant,

Yes, you will be eligible for JEE main examination after NIOS on demand examination.

According to the JEE mains Official Eligibility Criteria, If a candidate appears in 12th or equivalent class in 2022 are also eligible for JEE Main 2022. NIOS candidates can also apply for this exam . Higher Secondary Certificate Vocational Examination students are also eligible.

Further, to know more about the JEE mains examination, eligibility criteria, admissions, syllabus details, and further information, etc, you can follow the below mentioned link to know more about this in detail : https://engineering.careers360.com/exams/jee-main

I hope that this will help.