I've tested here on my test instance and indeed this option is not available on next-gen projects, only on classic projects.
Based on your question, I've created a feature request:
Please, click on vote and watch to receive updates about the feature.
If you have any other question, please let us know.
Hi! My name is Eoin and I'm a product manager working on Team-managed projects in Jira Software Cloud. We're continuously improving and updating Jira Software and feedback from our customers is ...
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