Is there a way to access feature flagName in jira automation?

[Rashmi Santhosh]

We use launchdarkly tool for feature flagging and link jira epics to them. Would like to create a automation rule that copies flagname from epic to all child issues. 

The field "flagName" is not available when searching for fields to set nor does it work when trying to access as part of smartvalue under additional field - {
"fields": {
"flagName": "{{issue.parent.flagName}}"
}
}