SAP S/4 hana 1909 Cloud Ex upgrade supports SMP or SCP for Work Manager application?

Hi All,

The current implementation of the SAP Work Manager 6.4 version is running in the SMP 3.0 server with S/4 Hana 1909 on-premise backend system.We are upgrading to S/4 Hana 1909 Cloud Ex SAP backend system.

Please confirm if the upgrade to S/4 Hana 1909 Cloud Ex system would support the SAP Cloud Platform(SCP) with the WM6.4 version or the application must continue to run in the SMP server itself.