The Apple Watch family share is good, but i could not find a way to download app from the family shared watch. My kid could access the AppStore, but when my kid was trying to get any apps, it said please go to the iPhone watch app and sign in with your Apple ID. I went to my iPhone watch app, there was nowhere to sign in with my kid’s Apple ID. Do you have the same issue? Is it because I skipped the activating cellular when I setup my kid’s watch?
