For preview of a spreadsheet “No Data”. And for new spreadsheet it shows 0 on contemnts
Could you please retag from “math”. You intended Calc as you talk about spreadsheets but possibly it should be “common”.
You question is not clear at all. I assume that you mean that you cannot see a preview of the document in Windows Explorer, see bug
Issue 107602 - framework: Implement ODF document preview for Windows Explorer