Have a simple view that combines two layers using Union. SQL server is the SDE backend. Both layers match exactly and have friendly alias field names with spaces.
My view completely dropped the alias values on the view. There is no way to edit them either.

I see similar posts but nothing for exactly this. My guess is I am out of luck but wanted to check before we do a big workaround (like add them in Pro then publish the service even though we really want then in the SDE).