As a. Net full stack azure developer with 10 years exp getting 24 LPA as a CTC where 3 Lakh is variable pay. Is it good or need to switch?

At 10 YOE , 24 is underpaid in today's scenario. 24LPA is not less earning but in terms of relativity it is far behind.

Definitely why not. Its always good to switch every 3-4 years till you have commitments and want full time safety.