Spreadsheet in Global templates and Space templates
If you are a site admin, you can create page templates in Confluence Cloud and make them available in every space on your site.
In addition to the template feature such as variables, placeholder texts, and labels, you can use Excel-like spreadsheets.
The followings are restrictions from the Confluence-side restriction in the 'Global Templates and Blueprints' admin page
In a view screen, it shows the following message at the location of Excel-like Tables macro, but it works well on actual instantiating
In an edit screen, a macro preview isn't displayed