There is a built in Workflow Condition called Sub-Task Blocking Condition. This condition blocks parent issues from transition depending on the sub-task status.
Take a look at Advanced workflow configuration for more information about Workflow Conditions.
Hopefully that helps get you the results you're looking for!
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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