hello aspirant,

The National Testing Agency has not yet announced any notification related to JEE Main 2021 reduced syllabus. However, since many topics have been reduced from CBSE syllabus for the academic year 2020-21 and the JEE Main syllabus consists of topics from class 11th and 12th, the chances of reduced JEE Main syllabus 2021 is quite high.it is highly expected that the JEE Main 2021 Syllabus will have 30% reduction .

to know the reduced syllabus for the class 12th and 10th classes, you can check the link-

https://engineering.careers360.com/articles/will-jee-main-syllabus-be-reduced

hope that helps