There are two ways you can export a quote report to a spreadsheet.
1.With the quote open, select the appropriate report in the ribbon, then select Print. In the Print dialog box, change to Export and select the Xlsx Report File in the Type field. This can then be saved locally.
2.With the quote open, select the appropriate report in the ribbon, then select the Excel icon beside it. This will show each report pipeline in a separate sheet, ie. Quote, Quote Comments, Quote Stock, Quote Address, etc.
Further information
Create Quote from Previous or Similar Quote
Create a Template for Recurring Quotes