The field Product Hierarchy (MARA-PRDHA) does not appear in transaction MM01, MM02 or MM03

Hello Experts,
I have requirement to do classification of MRO materials in Product Hierarchy.
For a test I have maintained the root node and sub node and assign FERT material to the PH.

But no material shows PRDHA field in general data not even the one for which I have assigned the PH.

I have checked config "Maintain Field Selection for Data Screens"
You can see for FERT it is optional entry

The 2nd problem is material type ERSA (Spare) is not in field ref list.

Can anyone please suggest how can I see the PRDHA fiel in general data.