The writer of this Article clearly does not know what Game development is like. Incase your not aware, Genshin Impact uses OpenGL ES (instead of Vulkan api) on android and metal api on Ios.
Metal api offers greater performance by far compared to OpenGL ES. So comparing different OS that are practically using two different Api doesn't make sense at all and is not a fare comparison
...One game is hardly representative...if it's consistent across 5-6 popular and somewhat demanding games, preferably all using different engines, then it could be of reference.
The Dimensity 9200 has only been used on the Vivo X90 so far, and looks to be a home run, especially GPU-wise. The MediaTek chipset outperformed the Apple A16 Bionic in synthetic GPU benchmarks recently, and has now been put through a real-world gaming test.