OnePlus has showcased the OnePlus Ace in China, which will launch in other markets as the OnePlus 10R. The OnePlus Ace features the MediaTek Dimensity 8100 MAX chipset and launches with ColorOS 12.1, not OxygenOS.
https://www.notebookcheck.net/OnePlus-Ace-New-mid-range-smartphone-debuts-in-China-with-a-MediaTek-Dimensity-8100-MAX-chipset-ColorOS-12-1-and-150-W-SUPERVOOC-charging.614747.0.html