When I set up Family sharing for iCloud storage and invited four - two accepted and use it at that time somewhere 1-2 years ago.
The other two did not activate it at that time. Both are inside my family plan and listed as "not using." Now both would like to use it. Neither have an ability on their phone to join. There doesn't seem to be an obvious, simple way to do so.
How do we activate them?
iPhone 14 Pro, iOS 16
If a member of a Family Sharing group declined the offer to share iCloud space at the time they joined the group they have the option of joining the shared space later by making this setting change on their device.
Apple has the instructions to do this in Share iCloud+ with your family - Apple Support
See the section down the page called Switch from your personal iCloud+ plan to your family plan:
On your iPhone, iPad, or iPod touch
In iOS 16 or iPadOS 16 later:
In iOS 15 or iPadOS 15 or earlier:
*Instructions for a Mac are included on this page.
If a member of a Family Sharing group declined the offer to share iCloud space at the time they joined the group they have the option of joining the shared space later by making this setting change on their device.
Apple has the instructions to do this in Share iCloud+ with your family - Apple Support
See the section down the page called Switch from your personal iCloud+ plan to your family plan:
On your iPhone, iPad, or iPod touch
In iOS 16 or iPadOS 16 later:
In iOS 15 or iPadOS 15 or earlier:
*Instructions for a Mac are included on this page.
Question Regarding iCloud Storage Family Plan
