Show average of a field across the site with the nodes field sat next to it in a chart

@effortDee you could make use of the "Chart Attachment" display and in that display, use aggregation and the average function (make sure you chose "Apply to this Chart Attachment only" when aggregating, adjusting your chart settings, etc. You would attach the Chart Attachment to your block that has the current page's product. Let me know if this gives you direction.