AnTuTu has published its flagship smartphone performance chart covering the first half of 2020, and it is the OPPO Find X2 Pro and Find X2 devices that claim the top two spots. Every phone in the top 10 features a Qualcomm Snapdragon 865 SoC and the only non-Chinese device is the Samsung Galaxy S20+ 5G in 10th place.
https://www.notebookcheck.net/OPPO-Find-X2-Pro-and-Find-X2-top-the-AnTuTu-half-year-chart-for-flagship-smartphone-performance.482724.0.html
I won't be surprised if most of the Chinese devices are gaming the benchmarks. Standard Operating Procedure for the mainland.