Hi @Regina Fernandes Dos Santos,
Thank you for posting in this community.
You can try to use the Embed web part in SharePoint to display a web page that contains the Jira Gantt chart. This way, the web part will show the latest version of the chart whenever you refresh the SharePoint page. You can search some third-party tools that can create and update Jira Gantt charts from data and embed them in SharePoint.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.