You will need to access and edit your project's WF transition to enable the option (see screenshot below). After it is changed, then publish the WF. Please see Atlassian reference for more details - https://support.atlassian.com/jira-service-management-cloud/docs/show-a-workflow-transition-in-the-portal/
Hope this helps.
Best, Joseph Chung Yin
Jira/JSM Functional Lead, Global Infrastructure Applications Team
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