3379752 - Mass Change of Output Items in Billing Documents Application and its Business catalog SAP_SD_BC_BIL_OC_MASS_PC not available in your system as of SAP S/4HANA Cloud 2308.

• Unable to find Mass Change of Output Items in Billing Documents application 
• Missing Business catalog SAP_SD_BC_BIL_OC_MASS_PC 

SAP S/4HANA Cloud

The app Mass Change of Output Items in Billing Documents and its Business catalog SAP_SD_BC_BIL_OC_MASS_PC are not automatically available in your system as of SAP S/4HANA Cloud 2308. 

The app Mass Change of Output Items in Billing Documents and its Business catalog SAP_SD_BC_BIL_OC_MASS_PC are not automatically available in your system as of SAP S/4HANA Cloud 2308. 

To make them available, you must activate the feature Mass Change of Output Items in Billing Documents (SDBIL_OC_MASS_CHANGE).

To enable specific business users to access the app, ensure that they are assigned to a business role containing the SAP_SD_BC_BIL_OC_MASS_PC business catalog.

For more information about activating features, see Activate Features.

If you are not able to find the new Activate Feature functionality: 

Please Follow the KBA 

3366956 - Finding and Starting Configuration App/Activity "Activate Features"

For more Info,

Mass Change of Output Items in Billing Documents | SAP Help Portal

Mass Change of Output Items in Billing Documents, SAP_SD_BC_BIL_OC_MASS_PC, Activate Features, SDBIL_OC_MASS_CHANGE, F7491, SD-FIO-BIL-2CL, S4_PC, S4_1C , KBA , SD-FIO-BIL-2CL , Fiori UIs for Billing (Public Cloud) , Problem