Hello Count19,
Thanks for that info and for choosing the Apple Support Communities. If we understand correctly, you are unable to share your Apple One subscription with members of your Family Sharing. To help with this, please make sure your Family Sharing members have their devices set to the same country as your device, meet the requirements and other steps from this Apple resource If you can't find your family's shared apps and content - Apple Support:
"Make sure that your device meets the system requirements
To access your family's shared content, you need an iPhone or iPad using iOS 9 or later, or a Mac using OS X El Capitan 10.11 or later. If you're using an older device, you won’t see your family’s shared content."
If your Family Sharing members are still having this issue, please contact Apple directly for further support: Apple Support
Cheers!