The maintained target mapping does not appear in the value help in Application manager once the catalog is selected.
In the lower corner there is a message on load saying
Only back-end app types are allowed in this system
Message No. SUI_TM_MM055
The administrator has not maintained any catalog types for this system. For more information see: https://help.sap.com/viewer/a7b390faab1140c087b8926571e942b7/latest/en-US/be50c9a40b504083a7c75baaa02a85fa.html
You can only create backend app types (Transaction, Web Dynpro Application, WebClient UI Application).
SAP Fiori FES 2020 and later
fplam backend catalog, target mapping, missing system spro catalog , KBA , CA-FLP-ABA , SAP Fiori Launchpad ABAP Services , Problem
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