A data request form is included for the USA. Other data request forms can be made with a simple contact form plugin.
This is a demo of a Legal Hub which can be made with Complianz and standard WordPress Features and a contact form. Styling is based on a theme.
There is not a legal necessity for a legal hub, but for premium users an overview of your legal efforts might be a nice-to-have. You can of course include any other legal document as well.