Can I have more than one iPhone on my Apple ID Account? I recently purchased a second iPhone for my special needs son and I have to have access to it. When I entered my Apple ID all my other devices are listed on his iPhone. I created his own Apple ID Account but then his iPhone isn’t listed on mine. HELP!
If you use your AppleID then yes, his iPhone is using your account so it sees what your own device sees. AppleIDs are like any other online login ID. Anyone using the login ID has full, complete access to the account, just as you do when using the AppleID.
You can use his own AppleID on his device and still use parental controls to limit things on it -> Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support
You should not share the same Apple ID. The following has information that may help: Family Sharing and Apple ID for your child - Apple Support
Multiple iPhones
