I am sharing a a link to the App Builder using the below method (see link from Mathieu).
It works fine, expect for that that the Parameter Validation does is not enabled for the viewers of that link. It is enabled in the general settings when when I open the model via My Models whilst being logged in and showing in both App and legacy. What am i missing?
Thank you for reporting this issue, we could reproduce it and have already deployed a fix. Could you test again and let me know if the issue is solved on your side?