There is a box icon in the top of your report canvas. Hover over the box to see your version. Click the button if you'd like to see what was added and if there are newer versions available.
For older reports, the box icon will not be there. Instead, there may be some report version in the FAQ page of the report, such as in the image below. If this is the case, it's highly recommended that you update your tyGraph reports to a newer version by following this article: https://support.tygraph.com/support/solutions/articles/67000314315-update-from-a-power-bi-template-app