Hi dean_roberts, thanks for your post.
Phone manufacturers are always finding ways to improve security for their users, this one here sounds like you haven't enabled access to your gallery for the eBay app, which is why you wouldn't be able to see the photos of your gallery (These days we need to authorize access to microphones, camera, gallery, etc in our phones for multiple different apps). I would recommend checking your device's privacy settings and make sure you've allowed the eBay app access to your photos, so you can upload them directly. If this is not enabled, the only way to fix it is by enabling it.
If you don't know how to enable access to your photos or anything else for the eBay app, or any other app, I would recommend googling it, so you can see how to do it step by step.
Thank you,
Marco
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