Toggling off 'New Designer'? Why didn't Esri just say so?! I am definitely a beginner with PA and it never would have occurred to me why I could NOT find my customer connector triggers in PA after following the documentation to create it. Thank you, thank you, thank you!
This will go great with having finally figured out the trick to creating feature class relationships that are compatible with S123 without having to rely on hosted feature layers anymore.