Hi,
Dont think so it is available OOB.
What you can do is create a custom field in the entity on which the workflow is configured to run. The last step in your child workflow should update the value in the custom field.
Add a wait condition in the parent workflow and it should continue only when the custom field has a particular value. Else you can stop the parent workflow with status as cancelled.
Hope this helps!!!
Thanks,
Prasad
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