Unlikely that would be added in to the reports module. You can configure such a thing in Excel Reports, and you can email those (but only as attachments).
The template model is passed to the template by the ReportChartCreator, https://github.com/infiniteautomation/ma-modules-public/blob/main/Reports/src/com/serotonin/m2m2/reports/web/ReportChartCreator.java
If you were to attempt such a thing, you would probably need to do something similar to how the existing "chartName" passes in the src for an image tag,
Edit: but, thinking about it, image chart servlet is passed XIDs to real points in the URL, so no, it isn't possible through the template model.