Xbox recordings with voice and game sound e.g. With Fortnite?

I have a question how I can start a recording on xbox that you can hear me in the recording.

I know that it's something like that because I once did something in settings because I made a recording in Fortnite where I and other players were heard in the recording, since I got XBOX series X, of course, I don't know how me make that you can hear me and others in the recording because I wanted to start TikTok…

With Xbox one it worked but my brother has an xbox one and it would be good if someone also says something about it.

I greet all of you who are reading!

You can use the game sound to record your mates' voices but not your own

How can I do that?