Hi Akshay,
If you are able to see My Paystubs app, this means that the standard app catalogue for HCM apps is active.
To create separate catalogue for My Paystubs app drag and drop the standard catalogue SAP_HCM_BC_EMPLOYEE_X1 from left bottom to up in launchpad designer page
http://<ip>:<port>/sap/bc/ui5_ui5/sap/arsrvc_upb_admn/main.html.
Then create one catalogue with Z name by clicking on '+' button and drag and drop to left top.
Now you can able to see SAP_HCM_BC_EMPLOYEE_X1 and Z catalog on left side top.
Click on Standard App Catalogue which is there on left top, try to drag the my paystubs app, then you can see copy and delete. Drag it on copy, there give your Z catalogue name in search. save it.
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Thanks & Regards
Abdul Basha Shaik