I guess what I’m suggesting is let’s figure out a way to get the booked slots into the user access tab.
What if you created a relation from the User Access tab to the Booked slots tab. Then you could use some lookup columns to bring in the relevant data. Now we could use these new lookup columns throughout the app (even when a relation for the given screen is not present)
Note: In a form you would add the component from “user profile columns”
Perhaps this post on creating clearable hint text could be of some inspiration to you.