if the file is a depot file and included in the blpackage, then you can open the depot file w/ the text editor in bsa. if it's just a file in the blpackage, you can't open it in the gui.
if you use a 'config file object', then it would be an entry that is put into a file, parsed by a grammar, and you would see the specific entry being put in.
with config files I mean for example .yml files or .xml files uploaded/imported as live server object.
unless they are imported as a depot file and then included in the blpackage, you can't edit them in the gui.
thank your for the information Bill