Xiaomi has updated the Mi A3 to the February 2022 security patch on its global software channel. The soon-to-be-replaced security patch arrives as V12.0.20.0.RFQMIXM, a 13 MB OTA file that is also available as a fastboot or recovery file.
https://www.notebookcheck.net/Xiaomi-Mi-A3-updated-to-the-February-2022-security-patch-globally.605247.0.html