I just don't really see it that way. I get plenty of texts about City from rival supporting friends whenever City drop points in the league, or get knocked out of champions league. Their games get plenty of viewers globally, and domestically. Grealish goes from the darling of English soccer at the Euro's to being booed at every away ground in the PL because he made a great career move for himself. I could give another 5-10 examples, but I'm not going to bore everyone to death. I think we're just going to have to agree to disagree.
City by no means have the footprint that United, Liverpool, Arsenal, Chelsea or probably even Spurs have globally.
The question I have is...why should City fans / supporters care about that though? United have billions of fans all over the world, that probably couldn't even find Manchester on a map, does that make their club better then City? That is not really for me or anyone to decide. I'm perfectly fine with City staying a more grounded domestically centered club that just tries to win trophies for as long as they're financially backed to do so. I could care less if they have a few hundred seats open for PL games, or thousands when they play a domestic cup game on a Tuesday night in February.