Hi Matt,
Thanks for using Syncfusion Products.
Yes, it is possible to zoom the diagram when we scroll the mouse wheel. Diagram has an event named 'MouseWheelZoom' for zooming. You have to press the control key while scroll the mouse wheel to zoom the diagram.
For your convenience, we have created a simple sample to demonstrate this and the same can be downloaded from the below link
ZoomScroll1882045853.zipPlease let me know if you have any concerns.
Regards,
Bala Murugan A.S