See the NEP 2020 isn't applied till now. It is targeted to be applicable by 2024. Thus if you seek admission in any course in the year 2021 atleast then the NEP 2020 isn't applicable and you have to obey the rules those are applicable. So yeah! Till now there are differences in Commerce student and a science students and still the streams are applicable.

To know more about NEP visit the link below:

https://news.careers360.com/nep-2020-school-education-new-structure-changes-in-board-exams

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