Some additional information to help you visualize things:
You can see if the coils aren't precisely aligned, charging will not occur.
Note the issue might also be with the charger's foreign object detection; it may have been implemented poorly and may see the MagSafe magnets as "foreign objects."
All Qi chargers need FOD to shut down charging if something like a coin is set between the device and the charger, as the metal foreign object can heat due to the way charging happens.
If this is the case, Ford should be able to correct the issue and issue a firmware update to fix it; obviously most third party stand chargers that are incompatible can't be reprogrammed and that may be another reason vendors like Belkin state "we never claimed our stand that was released before the iPhone 12 even existed was compatible with the iPhone 12, so it's not."
Note there's also a negotiation capability a charger may implement called FOD extensions that allow the charger and device to discuss whether a foreign object is present or not; I suspect the Ford charger and other stand chargers do not implement this, so this is another way in which it could be due to a failure in FOD.
Really, this would take less than a day for Ford to sort out definitively if they really wanted to.
Likewise if some enterprising YouTuber wanted to disassemble the Qi tray from an F-250 and make it a large flat surface and find out whether there is an alignment that would allow charging, that would also definitively answer the question.
