I've seen a lot about it being on the way from topics that are a year old. I have collector set up to do so, and that works fine. However, I've trained some colleagues to use the AGOL editor function to maintain/update their resources, but seem to have hit a wall in trying to manipulate related tables. Editing works just fine via collector on several devices, android and apple, but I'd like to be able to update and add to related tables from the online interface, or even an app.
I'd just like clarification that it is not possible in the AGOL editor.