Chart Sheet doesn't show via File Viewer

Hi,

Hoping someone can help me. Working to create a SharePoint Communication site and wanted to use 'File Viewer' web part to share Chart Sheet (has multiple charts created via F11 function). All I see are the tabs but not the charts (below). The Excel file does the same when I try and view the chart sheet (with multiple charts) in One Drive.

But I am able to view A chart if only one chart is moved to the Chart Sheet object. Does anyone know how to resolve this issue?

Thank you.