The Stable update V10.3.1.0.PCPEUXM has been officially released for Redmi 8A (codename is olivelite). 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 8A ROM Topics Xiaomi Devices Index
Download Redmi 8a (olivelite) Europe (EEA) MIUI 10 V10.3.1.0.PCPEUXM Recovery ROM with Android 9.0. Firmware size is 1.8 GB.