you Downloaded firmware for Huawei P20 EML-AL00 with build EML-TL00C01B108-SP2 (8.1.0.108),EML-AL00C01B108-SP2 (8.1.0.108),EML-TL00C00B108-SP2 (8.1.0.108),EML-AL00C00B108-SP2 (8.1.0.108)
Huawei P20 EML-AL00 Published on Released 2018, April . with Android 8.1, up to Android 9.0; EMUI 8.1.
Display size on Huawei P20 is 5.8" and the resolution is 1080x2240 pixels

You can flash The Stock firmware of EML-AL00 using This Guide.
more about Huawei P20 EML-AL00:

this model of huawei powerd by Octa-core (4x2.4 GHz Cortex-A73 & 4x1.8 GHz Cortex-A53) and the internal storage size and ram size is 128GB storage, no card slot.
also it can support No.
besides it can support Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) .
the Gpu chip model is Mali-G72 MP12 and also the Chipset model used on this model is Hisilicon Kirin 970
The camera on the Huawei EML-AL00 comes with and support 2160p video pixles.