Hi Jackaust,
Privacy and online safety settings in your Xbox account is one of the possible reasons as to why you can't broadcast your game on Xbox One. If you're using an adult Xbox account, you should be able to broadcast your game right away. If not, you can go to your
privacy and online safety settings to allow your Xbox account for broadcasting games.
If your using a Child Xbox account, you are not allowed to broadcast games by default. However, you can be able to manage its privacy and online safety settings by using the parent account associated. To change your privacy and online safety on Xbox One, you
may refer to this
link.
In addition, you may also check this
link to know more about why you can't broadcast games on Xbox One.
Let us know if you need further assistance.