Hello Aspirant,Hope you are doing well

Yes,you can give CUCET Exam if you are interested but it is not mandatory for JEE aspirant.

Central Universities Common Entrance Test (CUCET) is a national level entrance exam conducted by the one of central university every year. Qualified candidates of this examination will get admission in various UG and PG programs in one of 14 Central Universities and 4 State Universities across the country.

For further details regarding CUCET Exam visit this

https://www.careers360.com/exams/cuet

Hope this helps you

ALL THE BEST