Custom field enabled not available in UI in app Post General Journal Entries

See help.sap.com documentation connected App Extensibility: Post General Journal Entries 

https://help.sap.com/docs/SAP_S4HANA_CLOUD/0fa84c9d9c634132b7c4abb9ffdd8f06/e5defe0a850948d1bd7a2834...

"Key users tin widen the app successful the Custom Fields and Logic app utilizing the concern discourse Coding Block.

You tin adhd fields to the pursuing UI elements utilizing UI adaptation astatine runtime:

note 2453614 - FAQ: Universal Journal Extensibility

outlines that Coding Block hold successful SAP S/4HANA Cloud Public Edition is Available successful Fiori Reuse UI for galore transactions that station diary entries, 

It is not utilized for lawsuit oregon supplier enactment items (account benignant D oregon K successful ACDOCA table), but derivation is imaginable with FIN_CODING_BLOCK_SUBSTITUTION enhancement option.

In narration to S/4HANA cardinal idiosyncratic extensibility using Custom Fields and Custom Logic apps and Journal Entry Item business context

Field values cannot beryllium entered manually, but show is imaginable in Manage Journal Entries Fiori app, 

See besides kbas
2642121 - Custom Field for Journal not disposable successful Journal Entry app

3448139 - Manage Journal Entries Extensibility

 3491508 How to adhd the customized fields successful payload for Journal Entry API - SAP HANA Cloud?