Hello,

Hope you are doing good.

The syllabus for JEE Mains and Advanced is almost the same but there are slight differences Like for example Thermal physics is there in  JEE Advanced but not in mains whereas Electronic Devices, Electromagnetic Waves, Communication Systems is there in Mains but not in Advanced.

I will share links where you can find the syllabus for both JEE Advanced and JEE Mains.

JEE Mains: https://engineering.careers360.com/articles/jee-main-syllabus

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

Hope this helps