display date filter in Flux admin menu

src/Admin/FluxAdmin.php

@@ -172,6 +172,7 @@ class FluxAdmin extends AbstractAdmin
             ])
             ->add('createdAt', 'doctrine_orm_datetime_range', [
                 'field_type' => DateTimeRangePickerType::class,
+                'show_filter' => true,
                 'label' => 'Date',
             ])
         ;