Produce a Gantt from an agile project

[Dave Cavell]

I would like to produce some Gantt charts from our Jira Cloud Agile project. There are a number of plugins out there which can do this

https://marketplace.atlassian.com/search?hosting=cloud&product=jira&query=gantt

however none of them, that I can find, can use story points with status changes to extrapolate a bar in the Gantt.

We use story points, but we don't log time, or set end dates.

Any ideas would be really appreciated