I need to edit a sprint name, and delete a sprint in a next-gen project. Both sprints are already closed. I am an Administrator on the project so I know I have Manage Sprints permission. I can create sprints. Is editing a sprint name or deleting a sprint available in next-gen yet? I saw on this post as of Feb 2019 it seems it is not yet. Any update?
Indeed. I'm afraid next gen projects do not support updates to closed sprints yet. In classic projects, you can reopen a sprint from the Sprint report, but this is not fully featured yet for next-gen projects.
Just wanted to chip in and say that this would be useful, even if you just made the Sprint Report able to change the date and edit other information about it. The other way to solve this that would be nice is to have "closed" sprints show up in the backlog if you toggle on a "closed sprints" filter.
Sorry to say but this is a pretty basic feature and comes up pretty quick when trying to set up a jira project.