We do not have the ability to duplicate a location at the moment. You can, however, export the data you need and import it into a new location.
Exporting/Importing Menu Items
Take note, at the moment, when you do this for menu items, it imports ALL of the settings for that location, not just the menu items.
Exporting/Importing Buttons
Both Contact Buttons and Shortcut Buttons (dashboard) are located here:
RELATED HELP DOCS:
Grouping Locations with Google Sheets:
https://help.themarketerstoolkit.com/article/79/location-groups-grouping-locations-with-google-sheets
Custom Features per Location and Level:
https://help.themarketerstoolkit.com/article/1/location-groups-custom-features-per-location-and-level
Connecting to Snapshots with Snapshot ID:
https://help.themarketerstoolkit.com/article/31/location-groups-connecting-to-snapshots-with-snapshot-id
Linking to Menu Items Not Listed:
https://help.themarketerstoolkit.com/article/4/location-groups-linking-to-menu-items-not-listed