hi @ajo070
See if this will help:
Three collections
ClearCollect(col1,{Title:"One"},{Title:"Two"});
ClearCollect(col2,{Title:"One"},{Title:"Three"})
Concat the collections and add a page name to it
ClearCollect(_AllCol, AddColumns(col1,"Page","Page1"), AddColumns(col2,"Page","Page2"))
the OInSelect of the gallery = Navigate(If(ThisItem.Page = "Page1",Page1,Page2) ,ScreenTransition.Cover)

Now when the user click on the gallery the corresponding page will open.
In your case you will have to filter the collection still to get all the results.