Dashboard navigation through tabs

I am creating a dashboard for a project that I am working on. I am using repeating groups + option sets for the dashboard nav and url to switch between pages which are custom states. How do I reference data in these tabs, for example, if I’m using pages, I can say “current page’s x oy y”

This is my setup for example for my appointments page. I want to build a workflow to leave reviews on past appointments with this popup

but I cannot reference "group bookings as the data source. Normally, I’d use current page’s service