Sometimes shops have to deal with a lot of “sold” products and the products table becomes messy, so this is a way to sort by stock status (In stock -> Out of stock) on load. You can then use the column headers to sort by other data as usual, so this will only work once you access /wp-admin/edit.php?post_type=product page.
So, here’s a very simple snippet for you. Enjoy!
Once the snippet below is active, WooCommerce products will be sorted by stock status (on load)
PHP Snippet: Sort Products by Stock Status @ WooCommerce Admin