Xiaomi has updated the Mi A3 to the April 2021 security patch, a patch that addresses 18 critical or high CVEs for the Android One handset. However, V12.0.8.0.RFQMIXM also reportedly fixes a few bugs on the Mi A3, including DPI and charging status indicator issues.
https://www.notebookcheck.net/The-Xiaomi-Mi-A3-receives-DPI-and-charging-status-indicator-fixes-with-its-latest-update.532948.0.html