Hi Kevin, Yes, I’ve already filed a bug report for this issue. The Feedback ID is FB20572131. Thank you for following up.

Hi Quinn, Thank you for your quick response. Your explanation has clarified the limitations of ExtensionKit on iOS 26. I had previously tested it successfully within the same app, but when attempting it across apps, I encountered issues. Your response has resolved my confusion and helped me understand the current constraints of iOS 26. We are indeed considering filing a Feedback request to ask for an expansion of ExtensionKit’s capabilities, particularly regarding cross-app support. Thanks again for your help!

Hi Quinn, thanks for pointing that out. To clarify, what I actually meant to ask is: Is this feature limited to the combination of Xcode 26 + iOS 26 (since AppExtensionPoint is documented as available starting from iOS 26)? Or can an app built with Xcode 26 also run this feature on earlier iOS versions? Thanks again for your help!