Do you need to use the same images on different network sites? If so, then this is the plugin you need. WordPress Multisite Shared Media does just what it says: makes the uploaded media available across the network. It’s perfect for multilingual networks, and yes – it works for featured images and WooCommerce product image galleries.
Demo https://codecanyon.net/item/wordpress-multisite-shared-media/19306250
Downloadhttps://www.filecad.com/myJQ/WordPress-Multisite-Shared-Media-v1.2.4.rar