If Apple did this, and it turns out Apple did tune the model to the extent that it works really well with AirPods and really poorly with any other competitor, would there be any possibility of legal action against Apple (by the competitor or by the EU) on the grounds that the model's training is effectively limiting the functionality?

For example, maybe Apple purposefully trained the model to not only optimizing working with AirPods, but to optimize not working with any other input devices? If Apple could be in trouble if it became known they did such specific training, could it also mean there is the potential for them to have legal issues due the potential for them to have done such?

(I think we can also make a similar argument when it comes to the hardware being made to optimally run one specific model and possible allegations it doesn't run other models as well.)

If the government doesn't crack down on this sort of behavior, a company could use it to try to meet the legal requirements technically while also still hurting competitors. But if the government does crack down on it, then a company could be caught up under an accusation of doing this even if they didn't (they just didn't care to optimize for competitors at all, but never negatively optimized for them either).