my iphone xs wont charge wirelessly in the car

Hello,

Try another cable and check the charging port for lint or other debris. Also see this:

If your iPhone, iPad, or iPod touch won‘t charge

Good luck.

Depending on how the Qi charger in your vehicle was designed, the charging coil in your car may not line up properly with the coil in your phone.

Multiple users have had this issue with a variety of phones in a variety of vehicles as there's no real standard for where the charging coils are put.