If you have the same project with the same issue type in use - this isn't possible unfortunately.
Boards are just a visual representation of the project's issues, and even if they don't share any stories it's not the board that controls the workflows. You can have one workflow per issue type per project.
Your options here are:
Hi Atlassian community, A few months ago, we offered a sneak peak of the new hierarchy view on the roadmap. Thank you for all the feedback (and excitement) and for helping us shape the direction of...
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