Fake GPS should be able to be done with any Android device through Developer Options as far as I’m aware and they recently (few weeks ago) implemented a Contact Scopes Feature that allows you to share only the contacts you want with the apps you want
For those not in the US, is longitude really important when talking about where the northern lights are visible? Most places I’ve seen that they give notices they use US states as references of latitude, but it’s not mentioned if that is really important or you can see them from anywhere in the world, as far as it’s night time and there are no clouds of course