Just a heads up that if your kid was using an adult account on the headset (yours), that is against the Terms of Service. If you have a child under 13, you need to set up Family Sharing on your headset and create an account under that for your 10 year old that will have a lot of built in protections and no access to what are deemed inappropriate games for that age, etc. By allowing the child to use an adult account, someone very likely reported a child using the headset and that is why your account got locked. There have been many posts online about people having their accounts shut down for doing this so be mindful if you get your account back to follow Meta's ToS as they don't mess around when it comes to locking accounts and there are lots of folks online that report others for sport. I hope you can get your account back.