You can find the train functionality within the
cxcli flow train subcommand. You can read the documentation about this command here.
Here is a simple example of the
cxcli flow train command:
cxcli flow train my-flow --project-id test-cx-346408 --location-id us-central1 --agent-name test-agent
The above command will give you output similar to the following:
$ cxcli flow train my-flow --project-id test-cx-346408 --location-id us-central1 --agent-name test-agent INFO Flow trained
Is it taking longer than expected?
That is okay, depending on the amount of data to train it takes longer.
If you want to learn more about Dialogflow CX flow train execution, refer to the official documentation.