The Stable update V18.104.22.168.PCMMIXM has been officially released for Redmi 7A (codename is pine). 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 7A ROM Topics Xiaomi Devices Index
Download Redmi 7a (pine) Global MIUI 11 V22.214.171.124.PCMMIXM Recovery ROM with Android 9.0. Firmware size is 1.8 GB.
Download Redmi 7a (pine) Global MIUI 11 V126.96.36.199.PCMMIXM Fastboot ROM with Android 9.0. Firmware size is 3.3 GB.