There is this option in the Plan configuration to "use sprint dates when issues don't have start and end dates". It doesn't seem to do anything, and I can't find any documentation on what needs to be done to make it happen.

I have asked our scrum masters to populate all the Sprint dates so these will show up in the plans, but the plans are not populating.
It seems there should be some extra steps to populate these fields, so you can review them before committing them to Jira, but I can't find any instructions on how to do this.

(Jira v8.13.5, Advanced Roadmaps for Jira v3.29.7)