The Stable update V188.8.131.52.RJQMIXM has been officially released for Redmi Note 9 4G/9T / 9 Power (codename is lime). 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 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 Note 9 4G/9T / 9 Power ROM Topics Xiaomi Devices Index
Download Redmi 9t (lime) Global MIUI 12.5 V184.108.40.206.RJQMIXM Recovery ROM with Android 11.0. Firmware size is 2.8 GB.
Download Redmi 9t (lime) Global MIUI 12.5 V220.127.116.11.RJQMIXM Fastboot ROM with Android 11.0. Firmware size is 5.3 GB.