The new update currently available in China, and rolling out with the MIUI version 126.96.36.199.QECCNXM based on Android 10.
You should be able to progressively receive the update over-the-air (OTA) on your phones via the Updater app, otherwise, you can download the ROM packages in this thread below.
- Control center
- Optimization: Control center layout in landscape mode
- Optimization: Updated Android Security Patch to November 2020. Increased system security