Why isn't my Samsung Galaxy Note 8 show the Audible App when connected to Android Auto?

[Android Central Question]

I just upgraded my phone to the Samsung Galaxy Note 8. I previously owned a Galaxy 7 and connected to my car, a Hyundai Santa Fe Sporty, through Android Auto to listen to my audiobook from Audible. It worked fine, and I could access the Audible App on my car's screen to play my book. I now am only seeing Spotify, Google, and one other available app on my screen when my phone is connected. Why can't my screen now show the Audible app to listen through Android Auto? Please help. Do I need a software update on my vehicle, an app update, or what?

Thanks!