Phones and other devices located in the U.S. are now permitted to access signals coming from the European equivalent of the GPS system, named for the astronomer Galileo. This should make them significantly more accurate.
Recent iPhones have the hardware necessary to receive these signals, so it’s just up to Apple to add this feature. There are already a lot of GPS navigation device brands out there preparing to add the feature to their latest lines. You can check on https://geosettr.com/ the devices that will be adding the Galileo navigation in the coming months.