No, they are punishing because the ATT pop-up is not enough to comply with privacy rules, requiring 3rd party apps to have a secondary pop-up to be compliant (which Apple's own apps wouldn't need since they don't use ATT).
So it's more that Apple's ATT is not compliant with stricter privacy rules, not the opposite...
The "stricter" privacy rules of "Accept all" banners that send your data to 1000+ companies? Or "Accept all", but to Refuse you must tap a small grey link and manually uncheck dozens of boxes? Or worse, banners that force you to choose between accepting all tracking or paying a monthly subscription, blatantly illegal in the EU but ubiquitous in Italy even among large companies and news sites?
Meanwhile ATT blocks access to IDFA (instead of making it a pinky promise), and if apps were honest and were denied ATT it should disable other tracking too. The user has already indicated lack of consent.
It's not only that.
> The terms were also found to be disproportionate to the achievement of the company’s stated data protection objectives. Since user data are a key input for personalised online advertising, the double consent request that inevitably arises from the ATT policy, as implemented, restricts the collection, linking and use of such data. As a result, such double consent requirement is harmful to developers