Perhaps they should fine the companies that want to do such intrusive tracking? Apple’s not sharing data with third parties for their internal stuff, that’s a big difference when Dominos wants to share with someone that isn’t Dominos.
Apple only blocks sharing links from outside the app Dominos app to other apps (bolstering Apple's ad monopoly). Apple does nothing to stop Domino's from sharing the actual important data 3rd parties track in the Domino's app.
Huh? Basically every sentence in your comment is wrong. Apps can link to other apps. There's an entire framework called Universal Links to support this. And Apple is the only platform maker that requires apps to ask for permission before sharing data for tracking.
Apps can link to other apps, but the receiving app can't track where that link came from (unlike HTTPS where you append anything you want, ie ref=otherapp.com). This has led to the large companies that reverse engineer this via web server hops, S2S calls and SDKs.