It can be hard to support members when they have multiple devices, each with its own requirements and software configuration. Did you know that Apple Support has a page dedicated to system requirements for various devices, software, and features related to iCloud?
Want to know minimum system requirements by feature or even what is available for an iPhone 3GS running iOS5 or preferred and minimum set up for Family Setup for Apple Watch? The support page covers them both. Have a friend running Windows 10? The page even covers system requirements for iCloud for Windows 11 or later.
Apple Support System Requirements Page