Xiaomi has released a new update to the Mi A2 Lite, contrary to rumours that it had stopped supporting the device. V11.0.19.0.QDLMIXM contains the latest Android security patch and is rolling out now as an OTA download.
https://www.notebookcheck.net/Xiaomi-releases-the-May-2021-security-patch-to-the-Mi-A2-Lite-its-first-update-in-three-months.540485.0.html