Google Maps does this in the United States -- at least when looking at maps on my computer or on my phone. Don't know if that information displays via Android Auto or not, since I never use that. As an EV driver, I wish they'd do this for chargers -- but, interestingly enough, Google Maps does now display how many chargers are at a given location and how many are free (ie, it will show 5 open chargers out of 8 total).When I was in Norway last year, I noticed Google Maps showed the prices at each station on the map if you searched for gas stations or fuel. It doesn't do it in the UK. It's a useful feature, although Norway has weirdly expensive fuel for a petro-state.
I barely drive any more, since I moved I take the train to work and the car only comes out at weekends, so I pay even less attention to the ups and downs of the price! The tiny car I do have gets 55-60mpg with the AC on.