My company uses Jira for tracking plans, tasks, milestones for development and other projects. We want a very simple linear graphic (simple gantt) to represent project phases on one bar / line. See the image included for an example.

Right now we are using a google sheet, updating delivery dates by hand, and color-coding project phases. Seeing that Confluence is adding table graphics, I wonder whether I might be able to automate getting dates from Jira, putting into a confluence table, and generating a stacked bar chart, thus showing a summary of every project on one page.
Appreciate your thoughts, advice, creative ideas.