When your product has a monopoly market share, you don't get to use it as a weapon against competitors in other markets, even if you claim there is some imaginary exception to antitrust law involving servers.
The entire point of antitrust law is to place limits on what capitalists are allowed to do.
Apple doesn't have what American law sees as a monopoly market share in any market.
Be aware that other jurisdictions, like the EU, start placing restrictions on the behavior of companies with lower market share than American antitrust law requires.
Instead of passing laws, maybe the EU could foster an economic environment where Europeans wouldn’t have to depend on American tech companies and actually has tech products that people wanted to buy…
You don't get to demand that the server support your endpoint, period. There is no precedent for that ever happening in US antitrust law, because it's not anticompetitive.
If you think otherwise, make your case to Google's lawyers instead of spinning hypothetical case law.
https://www.ftc.gov/advice-guidance/competition-guidance/gui...