If only there were phones made by other manufacturers where the experience, which you know in advance, is different from the iPhone experience which you also know in advance! Then this wouldn’t be a monopoly!
Though since even "literally" nowadays often means "figuratively" instead, you might as well say this is what the word means now.
Nobody is forcing you to use an iPhone, billions do fine with the alternatives.
Apple does not have a dominant market position, an oligopoly or a monopoly and certainly is not illegally abusing any monopoly power.