Download MIUI V220.127.116.11 India Stable Recovery ROM for Xiaomi Redmi 8A Dual from here.
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Archive name: miui_OLIVEWOODINGlobal_V188.8.131.52.PCQINXM_facc7a4121_9.0.zip
Size: 1.9 GB
Xiaomi device code name: olivewood
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data. BTW, a link doesn’t last forever.