The Stable update V18.104.22.168.PCNEUXM has been officially released for Redmi 8 (codename is olive). 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 8 ROM Topics Xiaomi Devices Index
Download Redmi 8 (olive) Europe (EEA) MIUI 11 V22.214.171.124.PCNEUXM Recovery ROM with Android 9.0. Firmware size is 2.3 GB.
Download Redmi 8 (olive) Europe (EEA) MIUI 11 V126.96.36.199.PCNEUXM Fastboot ROM with Android 9.0. Firmware size is 3.7 GB.