No
IOS 16 is the minimum required now to use the app.
If your device has iOS 16 the app store will say you need iOS 17, but it should still download a version to your phone that allows you to keep using eBay via the app.
If you are unable to update to iOS 17 and do not currently have iOS 16, you can continue to use eBay via ebay.co.uk on your mobile or desktop browser.