https://www.techradar.com/news/heres-why-the-huawei-p20-isnt-called-the-p11

Huawei just announced two new phones in the form of the P20 and P20 Pro, which we initially (back when rumors began in 2017) expected to be called the Huawei P11 and P11 Plus.

Exactly why the company used the new names of P20 and P20 Pro hasn't been made clear in marketing leading up the launch. TechRadar asked Huawei Senior Director of Product Marketing, Steve Lai, why the new names don't directly follow on from the Huawei P10.