You need to finalise the transaction this way, this only can be done on the Seller Hub here:
https://www.ebay.co.uk/sh/ovw
Go to Orders >> Awaiting Postage, click on the item then top left on View Order Details.
Far right from More Action drop down menu click on ' Mark as Dispatched' . Dispatched is eBay's wording for a collected item.
As there is no tracking to show delivery and no collection code, send your buyer a message if they would kindly send you some feedback this shows delivery, and it should release your payout sooner.
@mulberryman63