Manage Purchase Order App with Extended CDS with Field Control

[BH2408]

Hi Team, 

We have been extending the Manage Purchase Order App by Extending the underlying Items CDS Views. Whole manage Purchase Order was designed and Deployed with BOPF. Due to limitations we have been using this approach by Extending the CDS Views. 

1. I see the newly extending field in SEGW and App 

2. now based on certain fields I need to enable and disable the field- for this I have been using the Fieldcontrol BADI . However in the field Control Purchase Item BADI , it is not showing the Extended field to control. 

I see the Custom Field Fields based out of Business Context , however not the Extended Field with underlying CDS. 

Does anyone face this kind of limitation with Field Control BADI on PO or any other applications. 

Thanks and Regards,

Bharani