I can't change my Xbox Privacy Settings because it's decided I'm a child member of an Xbox...

Hello, My name is Jesse. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

You'll need a parent (adult) account in order to change your privacy settings.

The parent account will need to create a family group and add you as a "Member" while they are the "Organiser" in order to change your settings. Here's a detailed explanation of how to do that https://support.microsoft.com/en-us/account-bil....

If you're not on a child account or to know how to change the settings from an adult account please see here https://support.xbox.com/en-US/help/family-onli...

Refer to the "Manage settings on Xbox.com" tab, underneath it you'll find how to manage your privacy settings on an Adult or Child account.

Hello!

Thanks for bringing this inquiry to our attention here on the forums. I understand you're having issues setting up your Settings on a child account is that correct? You will need to sign into an adult account that is a member of the same Microsoft Family
as the child account to change the settings for the child account.
Change your child’s Xbox privacy and online safety settings

I'm on my only account attached, which it claims to be the child account and Xbox privacy and
online safety settings it just sends me to:

https://support.microsoft.com/en-us/help/4026796/microsoft-account-change-childs-xbox-privacy-online-safety-settings

Xbox One safety features enable you to control what kinds of content each of your family members can access on Xbox One. To set content restrictions, see How
a parent can change the privacy and online safety settings for a child account. For help changing these features, see Troubleshoot
changing online safety or privacy settings on Xbox One.

It says

Change your child’s Xbox privacy and online safety settings
when I try to change my privacy settings.