iCloud Drive folder shows list view on iPhone but not Mac or in browser. How do I select list view on Mac and in browser?

On your Mac use File > View > as List from the Finder drop down options in the menu bar.

In your Mac's Finder toolbar you might have the view option available to click on - it's the four squares representing the four choices: Icons, List, Columns, and Gallery. If it isn't there you can add it. Right-click on the toolbar, select Cusomise Toolbar and drag the group in the View option up to the toolbar.

In a browser at www.icloud.com the only option is the icon view across the screen.