É possível sim. Você pode ver mais sobre isso aqui: custom workflow. Abaixo coloquei a resposta oficial da Atlassian sobre isso. É de uma das documentações deles.
It is possible to restrict the progression of an issue through workflow depending on the status of the issue's sub-tasks. For example, you might need to restrict an issue from being resolved until all of its sub-tasks are resolved. To achieve this, you would create a custom workflow and use the Sub-task Blocking Condition on the workflow transitions that are to be restricted by the sub-tasks' status.
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