Hello All,
How can I add Value help (F4 help) in Standard Existing field in SAP FIORI Element application.
For example:
Fiori app - Manage Purchase Requisition - Professional
App ID: F2229
Want to add F4 help in Requisitioner field

I have tried both the below options, but couldn't meet the requirement.
Option 1: Using CDS extension:
Consumption CDS name : C_PurchaseReqbLimitItem, ( Metadata extension does not allow in this CDS )
Even if some of CDS does allow Metadata extension, still I am not able to add custom CDS view as a value help(F4 help).
For example - Find maintenance order app.
Option 2: Using UI Extension ( Adaptation project in Business application studio )
I am not getting any option to add value help in existing standard fields.