I make EVs at a different company, and I'm not a fan of Tesla's range indicator. It's misleading because miles don't map directly onto battery charge. The range that that indicates is miles on flat level ground with no wind at 55mph which you will never experience in real life. At 80mph you're going to get 2/3 of that range every time. At 35mph you can get significantly higher range, but no one is ever going to drive 300+ miles at 35mph. If you just tap on the range icon it will change to percent, which is less misleading. ICE vehicles have all the same problems, but most ICE vehicles always just show gas level, rather than range.
My PHEV VW car shows range which is estimated based on the petrol level and the battery charge. I learned this the hard way because I noticed my petrol tank was very very close to empty driving on the motorway. I simply engaged fully electric mode, which turns off the petrol engine, and that way made it to the fueling station.
It sort of learns based on the immediately previous drive what the driving style is, and therefore what the range is.
