You can view your backorders by creating a filter within your Sales Order Page. Create a new filter with the Status set to Active & Finalized. Set the Shippability status to Partially Shippable & Not Shippable. Set the Backordering status to Partially Backordered & Not Backordered. Enter a name for the filter and click on Save Filter. The filter will show you a list of your Backorders that are yet to be shipped.