I have previously been updated domains through the ArcGIS Solutions Add-In for the Citizen Problem Reporter. I have updated to ArcGIS Pro version 3 and it no longer compatible. Is this something someone else has come across? Thankfully my intern's computer had not been updated yet so I was able to update what I need to work on; however, is there a workaround to update a domain on a view layer like in the Citizen Problem Reporter in ArcPro or Online without using the Update Domain tool?
Have you tried updating the domains directly on that view layer in AGO? The second method shown here regarding an overwrite seems a bit more perilous however. Good luck!
https://support.esri.com/en/technical-article/000012279