Apple’s iCloud website has looked the same for a while. The old design followed the block design of earlier iOS versions. So, it is no surprise that the redesign looks more like the iOS widgets that Apple users are already used to seeing elsewhere.
The new iCloud website is customizable so that you can choose which apps appear as tiles with previews for various iCloud services, including Mail, Photos, and Pages.
A post I saw said that “Apple’s new iCloud website design is a thing of beauty. That seems a bit extravagant to me. It is more of catching up with a design used by them elsewhere.