List all the entities in a folder

You can use a fetch entities step whose type is set to Entity_header_data and give it a fetch criteria of entity_folder_id = your parent folder id. This will give you all of the entities in the folder specified. You can then pass this list into a datagrid form component on your form to display all of these entities. You can, if you want, also create a data repeator for the entity_header_data datatype if you would like additional control of the display of the data.