You are using the Fiori app "My Travel Requests (Version 2)", you want to extend the standard app to fulfill your own requirements. Read this KBA to understand the different possibilities to extend the app on Backend or UI Level.
Extensibility, OData, SAP UI5 , KBA , FI-FIO-TV-MTR , My Travel Requests , FI-TV-ODT-MTR , My Travel Requests , How To
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