Benefits Activity Center Redwood page customization

Summary:

In Benefits Activity Center, I want to customize or display custom message when the pending option is selected to Approved

Content (please ensure you mask any confidential information):

In Benefits Adminstration→Benefits Activity Center→ Open an Employee, When the admin selects approve i want to make Received Date as mandatory or even displaying a custom message should be fine.

When i open the page in Edit in Visual builder, im not seeing an option with the fields displayed in Drawer pop up to customize.

Version (include the version you are using, if applicable):

25D

Code Snippet (add any code snippets that support your topic, if applicable):