Hi Sushmitha,
I took your json snippet and created an import mapping with it. The domain model that was created looked like this
The information you want is in the JsonObject table. To retrieve that you would need to have a microflow that retrieves the policyinformationlist object (this has list in the name but is only a single object), and then retrieves all of the jsonobject records.
Alternatively, in your import mapping you can uncheck the "policyInfromationList" to have your mapping look like this.
That way you only need one retrieve by association to get all of your records.
Hope this helps!