Update here - I got it working again by republishing the app from unlisted to unlisted.

Is there any update here? Appclips have not been working properly for a month now and I'm not even sure if Apple is aware of the problem. I filed a feedback report (FB20741344), with no response. I can't resubmit my unlisted app to be listed so my usecase is completely broken

Is this only happening on iOS 26 devices? I had my app clips no working for iOS 26 devices and have received a similar error, along with "App Clip Unavailable". It is an unlisted app in my case. Seems to be related to iOS26 in my case

This seems to be related to iOS26, app clips also no longer work over NFC

We have the same issue with NFC: app clips stopped working on iOS 26, stating "App Clip unavailable"

Update on my case: code level support just redirected me to my feedback report… which got closed because they wanted me to include a screen recording of the issue (I did post a screen shot of the diagnostics output but apparently that wasn’t enough). Not sure what else to give them, I don’t think they really read the report as they indicate there are no similar reports while multiple people on this forum have been complaining with their feedback report. Hope your outreach goes smoother

@mr_app Where did you ask if I can ask? Did you get acknowledgement somewhere? It looks like the Apple engineers are currently not aware and this is considered an end-user issue, but it looks like their propagation is affected. I did use one of my two technical support slots today to hopefully have someone look into it. My app relies on App Clips and it is the reason why I bought my Developer License in the first place, so I hope they can solve this shortly as I need to meet client deadlines.

I am experiencing similar problems, did you hear back from Apple on this?