Hi Anja47
welcome to the Apple (user-to-user) Community.
The 2016 Hyundai Veloster is listed as a model than can use CarPlay.
iOS - CarPlay - Available Models - Apple
iOS CarPlay isn’t available in all countries or regions though:
iOS and iPadOS - Feature Availability - Apple
says
"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"
If you are in one of the above countries:
Apple support has articles online to help with CarPlay:
Check that you have the latest iOS version on your iPhone:
About iOS 16 Updates - Apple Support says iOS 16.4.1 is the newest.
How to: Use CarPlay with your iPhone – Apple Support
Use your vehicle’s built-in controls to control CarPlay – Apple Support
How to: Change settings in CarPlay – Apple Support
__________________________________________
Trouble-shooting:
If CarPlay isn't working as you would expect it to, find out what to do:
If you need help with CarPlay – Apple Support
If needed: You can contact Apple Support from the link at the bottom in above article.
All the best :-)