iPhone and iPad users who share apps with their family members through Apple's Family Sharing feature can now also share apps with subscriptions.
In the App Store settings under "Subscriptions" there is a "Share New Subscriptions" section that seems to be automatically enabled and allows app subscriptions to be shared among family members. The new option is available in the current version of iOS 14.2 or iOS 14.2.1 (available only for iPhone 12).

Developers decide on family sharing
Apple announced subscription sharing options as part of iOS 14, iPadOS 14, and macOS Big Sur. Developers can decide whether subscriptions should be available to members of a Family Sharing group. Some apps have implemented the feature, as Ryan Jones noted on Twitter. Until today, if a member of a family purchased an app with a subscription benefit, there was no built-in Possibilityto share these subscription features with other family members. That's changing now. (Photo by Denys Prykhodov / Bigstockphoto)