For those who are used to Apple CarPlay or Android Auto the Tesla Model 3, Model Y user interface may not be what you are used as far the Tesla options for music streaming and Navigation.
If you use the Amazon Echo devices at home there is an Amazon Echo Auto device (a microphone array really) that connects to your phone and enables hands free operation of the Amazon Alexa app.
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Streaming Service Choice
Apple Carplay enables you to play your iTunes music; the Alexa app can connect to Amazon Music, Apple Music. Also, Alexa can connect to Audible books or even read you any book from your Kindle library.
If you normally use Sirius/XM, you can add an Alexa skill, let Alexa sign into SiriusXM using your SiriusXM account credentials and then Alexa can be directed by your voice, just by speaking "Alexa, Play Classic Rock on SiriusXM" or Alexa, play channel 12 on SiriusXM.
If you have a favorite radio station you can use Alexa to listen; just say, for example "Alexa, play KSFO on Tunein and your radio program will begin streaming through the phone and to the Model Y's audio system.
When you set up the Alexa Auto settings within the Alexa App you specify whether you want to use Apple Maps, Google Maps or Waze. Alexa will provide audible, turn by turn directions through the Model Y's audio system, your phone will display the preferred navigation app.
If you allow the Alexa app access to your phone contacts then Alexa can make phone calls.
To use the Alexa app in the Model Y you just select your phone as the audio source and launch the Alexa App. If you have the Amazon Echo Auto device then there is no need to hit the talk button on your phone, Alexa is always listening, waiting for your next Alexa command.
I've noted in the provided link that the Amazon Echo Auto, normally $49.99 is on sale for Black Friday (04:00 AM to 08:00 AM) for just $19.99 (this offer includes 6 months of Amazon Music Unlimited or you can just order the Echo Auto without the Amazon Music Unlimited offer for the same $19.99)
The only negative with Amazon Alexa app and Amazon Echo Auto is that your music, whether Amazon Music or Apple Music streams via your phone so your phone's data plan, data rates apply.
You can listen to your iTunes music that is already downloaded on your iPhone via bluetooth on the Model Y's audio system but the Amazon Alexa app does not work to control the iTunes music that is playing. You can use the Tesla touch screen or the steering wheel control so pause, play or skip songs in the iTunes playback. The volume control in the Tesla is the left scroll wheel, also there is a volume slider on the lower right side of the Tesla touch screen.