Xiaomi has released new software updates for the Mi A3 on its global and European branches. The two updates, distributed as V12.0.18.0.RFQEUXM and V12.0.21.0.RFQMIXM, are available as OTA or recovery files.
https://www.notebookcheck.net/Xiaomi-rolls-out-new-updates-to-the-Mi-A3-in-Europe-and-other-markets.610683.0.html