@sara rashid Thank you for reaching out to us, As I understand you trying to configure Session policies for activities within browser.
Would request you to review the below links on how to achieve this ask
https://www.youtube.com/watch?v=hPW3E51cIac
https://oceanleaf.ch/ca-dfca-session-policies/
https://learn.microsoft.com/en-us/defender-cloud-apps/session-policy-aad
Let me know if you have any further questions, feel free to post back.