Download MIUI V11.0.10.0 China Stable Recovery ROM for Redmi 8A from here.
File name: miui_OLIVELITE_V11.0.10.0.PCPCNXM_9cc63fbd89_9.0.zip
Device: Redmi 8A
Codename: #olivelite
Region: China
Version: V11.0.10.0.PCPCNXM
Android: 9.0
Size: 2.0 GB