Family App Purchases
For a family, if an app is purchased on one child's device, is the app available for a second child's device? Or, do we need to pay for the app on both devices?
iPhone XR, iOS 14
You should set up Family sharing. I am not sure if subordinate purchases before the share is set up are shared but the sharing idea is there.
https://support.apple.com/en-us/HT201088
