You can sort subfolders by name, type, size, or date. You can also choose to display the folders and files marked for deletion.
Navigate to the subfolder then tap the menu icon () on the right side in the top bar.
This displays the contextual menu.
Tap or pull down the arrow under Filters.
Choose to sort by folder name, type (shared or private), size of the folder and its contents, and the date it was last modified by tapping the appropriate icon. You can then choose to sort in ascending or descending order. When done, tap the X at the bottom of the screen to close the menu and see the results of your sort.