"Split Backorders plugin automatically creates a separate order with status “Backorders” for the products that are not in stock(products on backorder)"

"Split order by Category for Woocommerce" allows splitting an order into separate orders based on category.

Split order by warehouse plugin helps to split the orders as per the warehouses. This plugin works as per assigned warehouse products in the backend.

“Split order by weight” plugin can split an order automatically into multiple orders based on the weight of the items in the cart.

Volumetric Shipping allows merchants to calculate shipping charges according to the volumetric weight rather than the actual weight.