People have been commenting through the thread that other phones have had problems with the BMW charger, but that's really beside the point... You're using bad logic.
Even if the iPhone14 didn't have problems and the 15 does, that in no way points the finger at Apple. In the absence of other evidence, you couldn't draw a conclusion either way. If one or the other device wasn't fully compliant with the standard then it's a crap shoot how you'd expect them to work together, and each generation would be a new roll of the dice.
In this case though, we do have other evidence: there aren't reported failures of the NFC chips with any other Qi chargers as of yet. That suggests that the one charger that's causing a problem is the problem. Still no final conclusions to be drawn since the phone is new and information travels rather slowly and the opportunity of putting Apple and BMW into the same story of failure is just catnip to webfolk so I'd expect it to get more noise more quickly.