Not sure any of these answer the question but I guess the answer is No, we can’t add a location.
I do use the original location when it shows.
I do like to use the drop down as they are standardized and make it much easier to spot duplicates. Harder when one is Edison Twp, IL
And the other is Edison Township, Edison, Illin.
And another is Edison, Edison County, Illinois, USA.
At least easier for me.
I guess the official (?) answer is we use whatever we want and don’t bother with standardization.