How to DFU cpuapp+flpr at the same time

I work on nrf connect sdk v3.2.4(nRF54L15).

I plan to run the main application on cpuapp and the device control application on FLPR.
It's currently working fine.
In the future, I'd like to perform a DFU using BLE.
Please tell me how to perform a DFU on both cpuapp and FLPR simultaneously.
(How to create a single DFU image)

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