Hey aspirant

As per the NTA students can appear in for 3 consecutive years. As you passed in 2020 ,you could write jee in 2021,2022,2023. Also there is no age limit for jee. There is no disadvantages, if you wish to write you should. Also you could attempt other exams related to engineering.So that even though you was unable to clear jee you could join any other engineering college .Only disadvantage is that your age passes. But if you have the potential to study amd work hard you should go for it.