Hi scottsam1
welcome to the Apple (user-to-user) Community.
Wondering which CX-9 model ... 2019 - 2023 CX‑9 is listed as available for CarPlay
iOS - CarPlay - Available Models - Apple
Intro to CarPlay and iPhone – Apple Support
Note: CarPlay isn’t available in all countries or regions (see the iOS and iPadOS Feature Availability website).
2023:
"Australia Austria Belgium Brazil Canada Chile China mainland Denmark Finland France Germany Hong Kong India. Ireland. Israel Italy Japan Malaysia Mexico Netherlands New Zealand Norway Russia Saudi Arabia1 Singapore South Africa South Korea Spain Sweden Switzerland Taiwan Thailand. Türkiye United Arab Emirates. United Kingdom. United States"
Apple support has articles online that may help troubleshoot:
If CarPlay isn't working as you would expect it to, find out what to do:
What to do: If you need help with CarPlay – Apple Support
How to connect your iPhone, iPad, or iPod touch to your car - Apple Support
Learn how to set up and use CarPlay. Use CarPlay with your iPhone – Apple Support
How to: Use your vehicle’s built-in controls to control CarPlay – Apple Support
How to: Change settings in CarPlay – Apple Support
All the best :-)