The latest update addresses many bugs which were present in the previous build and it also improves the system security and performance of the device. You can check out the changelog below. The update is being rolled out via OTA (Over-the-air) and in a phase-wise manner just like any other update. So it will take some days to be available in all across the globe. Currently, the update is being rolled out in China only.

Meanwhile, you can manually,  you can manually check for the update. If you own the device, you can manually check for the update, Go to System > Software update > Check for updates. or open HiCare app > Update > Check for updates.

EMUI 9.1.1.193 April 2020 security update changelog

Safety

Integrated Android security patches released in April 2020 for improved system security.

Via

Huawei Nova 5 received EMUI 9 1 1 193 April 2020 security update - 89