BLE Mesh Friend and LPN Node

Hi,


I am trying to understand the Friend and LPN behaviour. For that I am refering to nRF sample application light" and "light_switch".
Below is the setup details:
1. On one node sample app "light" is running
2. On a. Another node sample app "light_switch" is running.
3. Both get provisioned and configured in the same network using nRF Mesh mobile application (iOS mobile)
4. Followed the steps to configure the element on "light_switch" to set the publish address to the first unicast address of the Mesh Light node
    Link: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/bluetooth/mesh/light_switch/README.html#low-power-node-support

With the above, there is no scenario where I could see that friend node has cache the message send to the LPN node and upon Poll request it has forward it to the LPN.

Particularly, looking for the scenario where friend node cache the message and forward it to LPN when requested.
1. Is there any separate application for such scenario
2. Or, how can the same application with same setup can be use to run the above scenario.

Thanks,

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