Unable to get keyboard and Mosue to work in game mode playing Fortnite

This is very similar to the following post, but more specific:

Unable to get keyboard and Mosue to work in game mode playing Fortnite

https://answers.microsoft.com/en-us/xbox/forum/all/unable-to-get-keyboard-and-mosue-to-work-in-game/de0a0886-87ed-4055-9997-8b0cdb7cce7c

For the following to work you must make the menu selections using your keyboard. If you use the controller to make your menu selections to start the game you will be placed in a room for those with a controller and your keyboard/mouse will be non functional
to make it fair to other players. To enter the room for keyboard and mouse users the game must be started by selecting the options using the keyboard/mouse. Hope this helps.

Mouse and keyboard support

Fortnite on Xbox One supports the ability to play with a mouse and keyboard. Note that when using a mouse and keyboard on Xbox One, you’ll be placed in a game with other users who also chose mouse and keyboard as their control option. To enable your setup
to use mouse and keyboard, see Mouse and Keyboard Support

Note If you’re on a child account, you’ll also need to enable settings for cross-network play to use a keyboard and mouse while playing
on Xbox One.

CRUSHER804- Did you ever get this to work?

I have a more specific problem here:

Unable to get keyboard/mouse to work in Fornite for child accounts (but they work
for adults)

My son has a child profile, and the keyboard/mouse don't work for him. But they do work for me if I play using my adult profile.

Hi there,

Thanks for reaching out. I'm sorry to hear about the issue with the keyboard and mouse capability.

I recommend to take a look at the following article:
Mouse and Keyboard Support on Xbox One.

Hope this helps.

Thanks for the post. How can I check if my keyboard is compatible with Fornite app?