Enabling developer mode in Huawei Mediapad M2 10.0 Self explanatory.

Normally Android 5.1.1 allows to tap 7 times on "Build number" field in Settings->Tablet info.

Unfortunately the "Build number" field is absent in my Settings application.

What else can I do? I need to use the developer mode for rooting

Update: here is a screenshot. I have redacted the SN. Locale is IT
Needed to tap on the Serial number field. This is the answer