I read the documentation:
I understand the logic of the expression, still, when I write the arcade expression in my form the fields do not appear even if I choose the condition or will appear on the form nevertheless.
I tried: $feature.PointType == "Feature" and $feature.PointType != "Feature"
When using == the fields never appear, when using != the fields appear with the fields that do not have arcade expression.
I had the idea that it was my tablet version, now I am on Android 10 and still not working.
It only worked like this:
DomainName($feature, "PointType") == "Feature"