For JEE MAINS the number of attempt is 3 years i.e., you are eligible for JEE MAINS in 2020,2021 and 2022. For JEE Advanced you only have two attempts, the 1st attempt is on the year of boards i.e.,2020 and the 2nd attempt is 1 year post boards i.e., 2021. So you can't appear for JEE Advanced but you can apply for JEE MAINS 2022 which is your last attempt.

To know more about the JEE Advanced visit the link below:

https://engineering.careers360.com/exams/jee-advanced

To know more about the JEE MAINs visit the link below:

https://engineering.careers360.com/articles/jee-main-2022

I hope this answer helps. All the very best for your future endeavors!