Hey @Dr. Jacque8! You can create a custom field to store locations, but it would have to be populated manually; our own location feature wouldn't populate that field automatically. Locations are included in subscriber exports, though — we have a guide on exporting subscribers here8 (the subscribers' locations will be included in a separate column in the CSV file). Not sure if that might be somehow helpful in this case.
That said, please feel free to file automatically storing locations in a custom field format as a feature suggestion here5. Our team monitors that topic and we always appreciate the feedback! ☺️