Preview for Excel File in Web Part Missing

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On our SharePoint site, I added a web part called "Highlighted Content" and set it to show any Excel documents that the user has access to. Can anyone tell me why the preview is missing? Is it the security settings?

2 Replies
That's totally unexpected, the highlighted WebPart should preview the Excel file

I did'n test all variants, but for Excel file it highlights only if you have tables or charts in the documents, looks like most recent table/chart