Hi Lokesh,
1. you can use Workflow 18900041 for Loan Workflow.
2. For visualization parameters , please check the following :
APPLICATION HRESS_LOAN_AP_OVP_TREE_IN
DYNPARAM sap-wd-configId=HRESS_LOAN_AP_AC_TREE_IN&WI_ID=${item.externalId}
NAMESPACE sap
SYSTEM_ALIAS SAP_ECC_HumanResources
Also refer to note,
2051421 - Not able to configure UWL connector to launch both WD Java and WD ABAP tasks (e.g.: leave request and travel approvals)
Regards,
Meera