Hello @benjaminaxiles, hope you are doing well.
Would you please provide more details on your expected application functionality to provision the certificates/private key? Are you expecting the provisioning to be done with an specific transport?
In the meantime, I suggest referring to the examples "zephyr/samples/tfm_integration/psa_crypto" and "modules/lib/nxp_iot_agent/zephyr/samples/el2go_agent", as these implement different approaches to key storage and provisioning, in particular, the "el2go_agent" example is meant to demonstrate how to use the Edgelock 2GO service to provision keys and certificates.
As a side note, I would suggest migrating to latest Zephyr downstream/upstream versions, as the support for RW612's security features has been modified since version 4.2.0.
Please let me know if this information is helpful.
Best Regards!