I recently upgraded my device from IOS 18.4 to IOS 26. My web extension has disapeared from safari. I can see it in Settings > Apps > Safari > Extensions and when I turn it on and re-open safari. I just get a mesasge that says "{extension name} is no longer avaiable". I have tried Manifest V2 and Manifest V3 both yield the same results. The current production extension bundled with the IOS app has the same problem. I can no longer use or test my own extension !? Help please !
How are you signing your Safari Web Extension? That message typically means that the signing certificate has expired. Could you please file Feedback at http://feedbackassistant.apple.com/ with a sysdiagnose and copy of your extension? Once you have filed, please share the Feedback ID.
A bug since 18.4. Apple still hasn't acknowledged it
I have the exact same issue since iOS 26 beta 1 and its still not fixed on beta 3. I also tried others' projects none worked. I am on a free account do not know if that's causing the issue