At the turn of the year, it seemed that Xiaomi would be bringing Android 10 to all its eligible Android One handsets. The Mi A3, A2 and A2 Lite were all due to receive Android 10 this month, but only one has so far. Worse still, the January update has started hitting the other two, and not as promised.
https://www.notebookcheck.net/The-Xiaomi-Mi-A2-Lite-and-Mi-A3-receive-disappointingly-small-January-update.450920.0.html