Customize search filters on custom VBCS pages and vanilla Fusion HCM Cloud pages

Summary:

Hello,

We are looking for a way to customize (add/remove/adapt) filters on search pages. (e.g for Positions page - delivered HCM Cloud page but also for custome build VBCS pages).

• What fields can you add as filters ? any field from the underling page? also FF ?
• What is the way of achieving this?

Also, is there a way to implement custom data access restriction per page (e.g certain users can see only certain positions based on their roles). This is specific security need for each page which is not supposed to be part of the standard Oracle Cloud security solution (by department tree or by permission list etc).