See the new rules as per AICTE is that you can study BTech without having Mathematics and 14 other subjects compulsory is not applicable yet and is yet to be introduced with the NEP 2020.

Thus as per now you will need Mathematics in order to study CSE. Now if you don't have mathematics in 10+2 then you can pursue it from open schooling like NIOS which will make you eligible for the course.

TO read the Indian Express article visit the link below:

https://indianexpress.com/article/india/aicte-institutes-can-admit-students-without-physics-maths-to-some-engg-fields-7226178/

To know more about NIOS visit the link below:

https://school.careers360.com/exams/nios-class-12

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