Obviously this is not the case at all in the android market.
Apple 44%
Samsung 16%
BBK Electronics 16% (Oppo/OnePlus/Realme 8%, Vivo 8%)
Xiaomi 8%
Others 16%
That's according to Counterpoint Research [1]
Profitability appears to be even more skewed in favour of Apple but I don't know the exact numbers.
It would be interesting to know what's included in that 16% others category as that's where any challengers would be coming from.
[1] https://www.counterpointresearch.com/global-smartphone-reven...
https://web.archive.org/web/20160423202414/http://www.dg.gov...
Unfortunately, I don't know what the authoritative source for company information is in China. It can't be blog posts and media reports I suppose.
Samsung is at about 35%, BBK is next at about 23% (Oppo+Vivo+Realme are subbrands of BBK as is Oneplus).
BBK is a bit the 'Luxottica of Android' if you will with several brands under them: https://en.wikipedia.org/wiki/BBK_Electronics
Plenty of other people care about market share (not to mention you're deliberately ignoring all the non-phone Android ecosystem that has established).
Apple doesn't dominate the number of widgets, they dominate in money.
(Sure they're owned by the same people, but Apple and Google are also owned by the same people - American 401k providers.)