Redmi 8/8a/7A is now pushing the MIUI 12 update.
The MIUI 12 update for Redmi 8 has been rolled out to global, European and Russian editions, MIUI 12 update for 8A has been rolled out to domestic and European editions, and MIUI 12 update for Redmi 7A has been rolled out to India. This update is a stable beta, but MIUI 12 for Redmi 8 global version is the final stable update.
Currently, there have been posts from Redmi 8A users claiming to have updated to MIUI 12 stable version.
Redmi 8/8A was released in October 2019, and the MIUI 11 system was launched at the end of that month. In July 2020, Redmi 8/8a pushed a stable update of MIUI 11 based on Android 10.
Redmi 7A was released in May 2019, followed by a stable update of MIUI 11 based on Android 10 in June 2020.