Hi Expert,
I have a requirement to extend My Inbox 2.0 for purchase requisition to add Manual Approval name in a new additional tab.
The Approval name are send back to backend and stored in a Z Table for further processing. However I encounter issue extending the app starting from front end UI until backend oData Services, Hopefully there a is workable solution.

Challenge 1 . Using SAP Business Application studio to extend My Inbox .
Status : Failed
Reason: https://answers.sap.com/questions/13184922/manifestjson-of-crossfndfioriinbox-not-recognized.html
Challenge 1.1 Use WebIDE personal edition (Full stack WebIDE no longer available and reserved only to paid version.
Status: Partially
Reason: New Tabs did not appear as expected , but we able to add a new UI on below.
reference used:
https://launchpad.support.sap.com/#/notes/2118812 (My Inbox CookBook )
https://blogs.sap.com/2020/08/09/fiori-my-inbox-2.0-extension/
https://fioriappslibrary.hana.ondemand.com/sap/fix/externalViewer/#/detail/Apps('F0862')/S18OP
https://fioriappslibrary.hana.ondemand.com/sap/fix/externalViewer/#/detail/Apps('F0401A')/S17OP

Screenshot taken from the cookbook. As you can see 6 is actually can be extend and add a new tab , but we tried and it did not appear. instead we are only able to add UI in 7.


Is there a way to add a tab appear? appreciate if anyone succeed please share a screenshot and know-how.
Challenge 2 Sent the Data Back to backend after user click approve or save button.
Status: not success yet.
Reason: so far from extending My Inbox 2.0 the data are read only the Approval button are from work flow, Attachment and comment box are stored in workflow as well.
https://answers.sap.com/questions/208301/uploading-attachments-in-my-inbox-fiori-app-for-po.html
ZTASKPROCESSING_V2 is the my inbox 2.0

What is the recommended way to sent the approval list back to backend?