Struggling with linking user input to Repeating Group

I am really struggling to link the user’s input to filter the list in my repeating group.

I have a Map with a couple of hundred markers.
And I have a list of all the locations in a repeating group below.

When a user types in a town or city and presses enter it should change the map to the area they want (and it does) and it should only list the area’s locations in the repeating group (it doesn’t!)

Pictures attached!