Yes, you can only add fields to all terms in a taxonomy, not specific terms. Do do this you’d need to create a custom location rule. Sorry, I don’t have any code for this and I can’t find any. I’m sure that there is an example of this on this forum, or a link to it, but I can’t seem to locate it.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users