@DeepakHM02  Flow actions cannot be embedded with in a section. They can be configured as optional process at case level/process level/assignment level. So that when user selects respective flow action a corresponding section associated in the flow action will be displayed. However flow actions can also be called from controls in the section by configuring Action set on the control(Open Flow action) like a modal dialog or overlay.

Following link might be useful.

https://docs-previous.pega.com/case-management/85/about-flow-actions#:~:text=A%20flow%20action%20controls%20how,complete%20(perform)%20the%20assignment.