Using the updateObject SOAP call doesn't include all report changes (i.e. security, metadata) - is there a web service that can be used to update existing BIP reports that includes all aspects of the report?
You can check the below WSDL for updateReportDefinition() Method
WSDL Endpoint : https://<FAHostName>/xmlpserver/services/PublicReportService?wsdl
Documentation : https://docs.oracle.com/cd/E28280_01/bi.1111/e22259/reportservice.htm#BIPDV395
For any specific Fusion BIP expertise, please create a thread with the Fusion BIP forum