Howdy JWinn207,
Thanks for posting in the Apple Support Communities, and congratulations on the new iPhone 14 Pro Max!
We understand how convenient wirelessly charging can be on the go, so let's see if we're able to isolate this. For starters, let's be sure the latest iOS version is installed. If an update is available, be sure to complete a backup prior to installing the update and let us know if the results change. For assistance with updating or backing up your iPhone, check out this resource: Update your iPhone or iPad - Apple Support
If you have the latest iOS version installed on your iPhone, let us know if there is any concern with charging the iPhone 14 Pro Max with a cable in your vehicle. If that works without issue, restart your iPhone then place it in the middle of the charging pad in your vehicle. For assistance with restarting your iPhone 14 Pro Max, check out the following steps: Restart your iPhone - Apple Support
How to restart your iPhone X, 11, 12, 13, or later
1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.
Let us know if this clears up what is occurring or not. Should you still face this, let us know if you can wirelessly charge the iPhone 14 Pro Max with a different supported accessory so we can isolate this to the vehicle or not to move forward.
Take care!