If you are preparing for RBI grade b exams and wish to target other exams, then you need to search for exams with similar syllabi to RBI grade b. Some of the regulatory body exams are listed below:

SEBI: The management portion is the same. However, you will have to study some specific topics but the phase 1 paper 1 syllabus is also the same.

IFSCA: If one can target SEBI, they must target SEBI since both exams are very similar.

NABARD: In NABARD only ARD, DM and computers are different rest of everything is the same.

IBPS PO and SBI PO: You can also target PO exams since the syllabus of PO EXAMS is a subset of the RBI Grade B exam and very similar to phase 1 of the exam. They are the best exams to target if you are preparing for RBI Grade B.