spreadsheet manager
When you open Numbers for iCloud, you see the spreadsheet manager where you create, open, and manage spreadsheets stored on your iCloud Drive.
By default, the spreadsheet manager shows recently opened or uploaded spreadsheets in the Numbers folder. Click Browse in the left sidebar to view all items in the folder, or to sort the contents by date, kind, name, or size. To search for a spreadsheet, press Command-F (on a Mac) or Control-F (on a Windows computer).
To return to the spreadsheet manager when a spreadsheet is open, click the More button in the spreadsheet toolbar, then choose Go to My Spreadsheets.