Script Location-based Augmented Reality in Flutter (dart code)

Hello, I require a flutter app (I just need the script too, then I'll continue it) that does these steps: 1) I open the application 2) the camera opens and framing the places in real time, based on where I am, it shows me the distance from them. As I get closer, the value of the distance from that point decreases 3) The points to show on the map are not on google Maps, but in a json that we will create custom that will contain: 1) Business name 2) Type of activity (restaurant or hotel) 3) Address 4) Latitude 5) Longitude This app must be able to build for both android and iOS. App will be made with Flutter 2.0 or 3.0 (the new version) + other best plugin for Augmented Reality See attached screenshot for the example Please contact me only if you have demonstrable experience with similar project, otherwise refrain. Thank you