I think this is not a problem. After all, the project will work remotely and you will communicate with doctors using a smartphone, the most important thing is to choose a specialist and that's it.
We can choose doctors only from our city and country, or from other cities or countries, will we also be able to choose doctors?
You can choose doctors from absolutely any country, the main thing is that the language barrier does not interfere with your communication. It will still cost on the blockchain, payment will also be as I understood it with platform tokens, and without a difference the location of the doctor and the patient.