When you say "does not make sense" do you mean it will also not run?/

The data structure you posted contains only one hashref (with substructures). It does not make sense to run a foreach loop on that hashref, since you can access the data by direct dereferencing.

We can only assume that this hashref is part of a bigger structure on which you would want to loop, but you don't show the larger structure, so that we can only make guesses.