Service Backed Record Type: How to sync new record added from my source

I have created a service backed record type where my source is a sharepoint list.

The record type is sync enabled.

New record is added or updated frequently in a day so a daily sync is not enough.

The client wants to have an option to trigger the sync manually via a click of a button.

So far i have configure sync option



I have also created a process model which the button will call



The problem is only the existing record in my record type gets sync for updates made in sharepoint list but the new item i created in sharepoint is not sync in my record type.

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