Hello Suzehokey,
Just to confirm, how are you trying to connect your iPhone to your car? Do you receive any specific errors when trying to connect? That information will help us plan how to proceed.
Please ensure your iPhone is connected to your car correctly, using one of the options outlined in the following link, so we can make sure there aren't any issues there: How to connect your iPhone, iPad, or iPod touch to your car
Connect using CarPlay
Available on select cars, CarPlay is a smarter, safer way to use your iPhone in the car. CarPlay takes the things you want to do with your iPhone while driving and puts them right on your car’s built-in display.
First, make sure that your country or region supports CarPlay and that your car supports CarPlay.
If your car supports CarPlay using the USB port, plug your iPhone into the USB port of your car or stereo. The USB port might be labeled with a CarPlay icon or a smartphone icon.
If your car supports wireless CarPlay, press and hold the voice command button on your steering wheel to set up CarPlay. Or make sure that your car is in wireless or Bluetooth pairing mode. Then on your iPhone, go to Settings > General > CarPlay > Available Cars and choose your car. Check the manual that came with your car for more information.
Learn more about CarPlay or how to set up and use CarPlay.
iPad and iPod touch don't support CarPlay.
If you're using CarPlay and its not working as expected, please check out this link, which has some suggestions that may be helpful: If you need help with CarPlay
Thanks!