My child can't send texts to me from their Apple Watch
My child is unable to send texts from their apple watch at times. They do not have an iPhone and I am the Family Sharing organizer and set up the watch for them on my phone. They have their own Apple ID. While my child is at school sometimes they can text me and it works fine and sometimes the texts won't go through at all. This isn't only to my phone anyone who they might try to text won't work. What is causing this and how do I fix it?
Apple Watch Series 6, watchOS 9