No matter what kind of post action I attempt (notification, or TestFlight), after configuration and saving the post action is missing when I go back to the configuration. I have also attempted adding a new configuration.
I do not see any errors it just doesn't save.
I have attempted to do this from both the web and directly in Xcode.
I had the same issue. It worked on the web but never showed up in Xcode.
Xcode 13.1 same for me. Works on the web, but on in Xcode
Same for me Xcode 13.0, worked on web 🙌