How do I let my users select online ordering location using a drop-down / show them other serviceable locations?

I’m using the Wix Studio Restaurant Menus app (New) and while it’s able to let my users select a location within the delivery radius, I want a more elegant way to give them another option if they’re outside the delivery radius.

I have tried customising the default Lightbox but am just not able to even change the error notification that the location is out of delivery radius.

The best thing for me would be to let the user select major areas and then add their specific address details. But more than anything, I want to retain users and give them context that if their current location isn’t serviceable, then they can select another location close to it.