If you're working on an outdated device that no longer supports current versions of the eBay app, you should be able to access eBay through a web browser on your phone/tablet.
If you're on iOS 15, follow eBay's instructions from this post:
https://community.ebay.com/t5/Mobile-Apps/App-will-not-update/m-p/34718836#M49148
If your device has iOS 15 you should still be able to get a version of the app that will run on your device
- Delete your eBay app
- Go to the App Store, search for eBay
- When you download it you will see this alert, tapping download should allow you to get a version that will run on your device.
