Hi Akash,
there is one Freestyle Component APB_ISR_UI_FPM that is using the so-called Basic Internet Service Request, which can be customized with Transaction APB_ISR_CUST.
When defining a form scenario by this transaction, you may then test it by running application configuration APB_ISR_UI_FPM_GAF_APPL_CONF and URL Parameter SCENARIO.
The framework is described e.g. in the book https://www.galileo-press.de/sap-interactive-forms-by-adobe_2417/
Regards,
Simon