Is it that there are more cars? Because I live in Amsterdam, and there's definitely more bikes than cars here, yet bicycle support still sucks. Although it's possible few cyclists use Google Maps because a) it's bad, b) they don't need to, and c) you need a special clip to use your smartphone live on your bike (though that's also true for cars).
Most modern cars have a center console with Android Auto, so you just plug in your phone to USB and it takes over navigation, communication and entertainment.