A5. No, if your son's phone is in airplane mode, it will not be visible on Find My iPhone.
Adding your son's phone to Find My iPhone is a simple process that can help ensure his safety. By following the methods outlined in this blog post, you can easily keep track of your child's location at all times. However, it's important to respect your child's privacy and have an open and honest conversation with them about why you want to track their location and how it can help ensure their safety.