Android recovery is a bootable partition, which lets you apply official system updates from SD Card, factory reset your phone or wipe its cache partition.
How to enter Huawei nova 6 5G recovery mode ?
Power off your device.
Boot in recovery mode by pressing and holding Volume Up, Volume Down and Power Button at the same time.
Release all buttons when the Huawei nova 6 5G screen flickers and in a few seconds the Recovery screen will appear.