Download MIUI V12.0.5.0 China Stable Fastboot ROM for Redmi 9A from here.
File name: dandelion_images_V12.0.5.0.QCDCNXM_20201120.0000.00_10.0_cn_7577fcff0f.tgz
Device: Redmi 9A
Codename: #dandelion
Region: China
Version: V12.0.5.0.QCDCNXM
Android: 10.0
Size: 2.9 GB