Is it possible to use the motion detection of the ONVIF cameras and have images sent to you?

Yes, this is possible.

Just create a routine and select the motion event. As source you use the camera.
At THEN select Notification and click that you want to receive an email with pictures.
You will receive an email with 5 images every time the camera detects motion.

💡 Tip
You can add a time period as a condition so that you don't get emails with pictures of yourself all day. For example, only in the time from 11 pm to 6 am.