Considering expected Class 12 CBSE Exams are scheduled probably from July as well as the Covid cases decrease below the 30-40k Range by the end of June, I believe you may expect remaining attempts of JEE Main, to be conducted in the end of June or probably in July with JEE Advanced in August.

Nevertheless, you may prepare strongly for the Examinations as make us of the extra time youve got preparation, due Covid and tranform this in a Blessing in Disguise.

For more information about JEE Main and Careers360's Crash Course do follow the link below

https://engineering.careers360.com/articles/careers360-jee-main-crash-course/amp

For more information about JEE Main do follow the link below

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