Huawei Nova 3 users getting the March 2020 security patch update with version number EMUI 220.127.116.118. This update improves system security using Android security patches and Integrated Android security patches released in March 2020 for improved system security.
Download Huawei Nova 3 EMUI 18.104.22.1688, just tap on Settings > System > Software update > Check for Updates and Download it!
Or, You can also get this update via the Hicare app: HiCare > Services -> Update > Check for updates.
Source – Huawei Update