There are some issues which users were reporting after the last update. One of the major bugs was users were experiencing no sound during a call. That is a major bug and now with this update, that bug has been fixed. There are some other fixes too. You can check out the changelog below.

The update is currently rolling out in some regions. Users with EMUI 9.1 are getting this new update as EMUI 10 which arrives with the version number 10.0.0.178 and weighs at a massive 4.52 GB in size. It has been released as an OTA update. 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. The devices are powered by Huawei’s own Kirin 980 processor coupled with 6/8 GB of RAM. The P30 houses a 3,650 mAh battery while P30 Pro has a bigger 4,200 mAh battery. The Huawei P30 comes with 40 MP+8 MP+16 MP rear camera setup, whereas the P30 Pro sports a 40 MP+8 MP+20 MP setup. Source

Huawei P30 P30 Pro December 2019 security update released with various bug fix - 57Huawei P30 P30 Pro December 2019 security update released with various bug fix - 84