I have resolved this issue myself.
I found that the AzureRTOS sample projects (sample_azure_iot_embedded_sdk, etc.) already have the DPS function built in.
In the main source of that sample (such as sample_azure_iot_embedded_sdk.c)
By enabling "USE_DEVICE_CERTIFICATE", it seems that it will operate using the DPS function, so let's take a closer look at that.
I will close this matter.
Yoji Sato.
Grape Systems Inc.