The Closed Beta / Nightly update 20.9.2 has been officially released for Redmi 10X 5G (codename is atom). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing fastboot getvar product in cmd/shell.
The firmware files posted here are all official Xiaomi MIUI or HyperOS ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.
You may interest in those contents: Redmi 10X 5G ROM Topics Xiaomi Devices Index
Download Redmi 10x 5g (atom) China MIUI 12 20.9.2 Recovery ROM with Android 10.0. Firmware size is 2.7 GB.