Redmi 7a %d0%bf%d1%80%d0%be%d1%88%d0%b8%d0%b2%d0%ba%d0%b8 -

For any method other than official OTA updates, your bootloader must be unlocked via the Mi Unlock Tool. Method 1: Official Firmware (Fastboot Mode)

Trusted third-party sources:

Xiaomi выпускает три версии MIUI для Redmi 7a (кодовое имя устройства – ): redmi 7a %D0%BF%D1%80%D0%BE%D1%88%D0%B8%D0%B2%D0%BA%D0%B8

All official fastboot & recovery ROMs: