Dropified stops syncing the order with the supplier once it has been marked as "Fulfilled", so the status on the tracking page won't update past "Awaiting Delivery" when the order is automatically synced.

However, you can still manually sync with the supplier to update the delivery status by clicking on the button to "Sync with Supplier" on the upper right-hand side of the Tracking page in Dropified.

You will need to click Advanced and untick "Only Update Orders Awaiting Tracking Numbers".