How to use AWS IoT Fleet provisioning on FreeRTOS "release-v10.3.1", I don't want to move to AWS-FreeRTOS

if I need to implement sample for CreateKeysAndCertificate,

  1. Do we have a fleet_provisioning_serializer.h/fleet_provisioning_serializer.c files and API’s related to it?
  2. In CSR demo main, we use “generateKeyAndCsr()” What is the alternate API call for CreateKeysAndCertificate method?
  3. Can you please let me know if test code or sample code available for CreateKeysAndCertificate demo?

The above will help me in creating a demo for “CreateKeysAndCertificate” on ubuntu.