PawarBhagyashri001
Add the fields to the Ticket Details form is all you can do for now. Otherwise you must modify the codebase. When modifying the codebase you are always on your own as you are deviating from core. The code is open source and publicly available on Github. Github has a great search tool and even a code tree/glossary that aids in navigating the code. You will proceed at your own risk. Good luck!
Cheers.