What part of the Synchronization step leaves you stuck? Did you try any of the below approaches Smarbear recommends from the link?
Azure DevOps: to implement interactions between TestComplete tests, you can use the following:
Use various parallel strategies to organize the pipeline run. You can command the pipeline to run several instances of a job simultaneously or you can run several instances of a job with various inputs.
Use secure files to store resources that the pipeline can access during the build run. To learn more about secure files, please see About pipeline resources in the Azure DevOps docs.
Use dependencies and conditions to organize the stage run order in your pipeline.
Use pipeline variables to store, send, and get data from TestComplete tests during the pipeline run.
