It seems like that is no easier way to export certain data like user workflow to another site.
Because it actually involved a few table once you create/update the workflow on the site.
For example :
#__social_workflows
-> it will stored user workflow basic info
#__social_workflows_maps
-> it will stored each of your existing profile type, group/event/page categories which belong to the workflow id.
#__social_fields_steps
-> if you have create different step from the creation form like registration form (user workflow), it will store it at this table to determine that how many step under this workflow.
#__social_fields
-> it will stored each of the custom field which belong to the step id.