Have you accidentally opened another account ? ... Reported to happen if using Mobiles/Apps to signin using Facebook/Apple/Google login options resulting in opening a closely matching but 'cloned' new account with missing History and/or corrupted account details ...
Log out completely and using a PC/Laptop, restart and try to recover the Original account/ history with > eBay.co.uk < Homepage login using previous/usual eMail/Username/s/Password/s etc.
Any unwanted account can then be closed. More settings check options here >
https://www.ebay.co.uk/help/selling/getting-paid/start-getting-paid-ebay?id=4795&st=12&pos=2&query=S...
