Why isn't Apple forced to the same deal with iOS? Not only do browsers not have the same prominence but they actually have to use WebView for rendering. Not to mention the other apps Apple refuses to approve because of "duplication".
I don't necessarily agree with such policies. For example the EU is thinking of breaking up Google because supposedly local players cannot compete, with inferior products in a market that Google created, but that's not mentioned.
Of course, iOS does suck because of its restrictions and I sold my iPhone 6 that I received as a gift. So I just exercised my right to vote with my wallet, which imho is more effective.
The anti-trust laws are for when that power gets abused -- when one uses their monopoly power as leverage over another market. In the case of Microsoft, by bundling IE with Windows, they were using their OS monopoly to crush a competitor in the market for web browsers.
None of this applies to Apple because they have nothing close to a mobile monopoly. If they did, the lawsuits would be over their position as gatekeepers of the entire market for mobile apps.