It is amusing that you use the example of making zoom the official video meeting app... because that is precisely what MS did to anger both US and EU regulators with IE. Creating private userland APIs and then unfairly granting access to them in order to meddle in a competitive market is arguably worse than anything MS did. As iOS devices are seen more as important tools and less as delightful toys, the more the pressure will grow for regulators to act.
You don't see the difference between the mere picking of commercial partners and what Apple is doing? Really?
What makes it different is that iOS is a general computing platform relied upon by millions and millions of people for most if not all of their computing, and anti-competitive actions like those undertaken by Apple not only damages developers not receiving preferential treatment, but also iOS users who are unfairly (likely illegally) coerced into making purchase, or use, decisions that benefit Apple and its partners.
General computing platforms are held to a higher set of standards than console devices. If Apple wants to call the iPad a computer, and market it as a replacement to traditional desktop and laptop machines, well, it is time for Apple to start treating it like one.