I’m playing minecraft on my Xbox on mouse and keyboard and I was playing and their is a...

Currently only Minecraft (without the "Xbox One Edition" in the title) is playable with keyboard and mouse.

All other games, including Fortnite do NOT work with Keyboard and Mouse on the Xbox One.

If you want to play Fortnite with Keyboard and Mouse, you can do that on a regular Windows PC.

Yes but what if I want to use the mouse and keyboard while streaming, I dont want to have to unplug my desktops mouse and keyboard and connect it to my xbox when I have the ability to play from here. Can I play mouse and keyboard supported games through
streaming?

Minecraft does support keyboard and mouse. I know a bunch of people who play with keyboard and mouse.

If you're curious for what other games have keyboard and mouse support, check out the link below. While it's not an official Microsoft site, I've found many useful articles from Windows Central and they have a solid list here:

https://www.windowscentral.com/list-xbox-one-mouse-and-keyboard-games

I am using a wired rgb mouse plugged into a usb 3.0 powered hub. I have not noticed my keyboard doing the same, but I really only use my mouse when playing minecraft.

I want to play minecraft split screen but the world is made on player 1’s account and player two can’t play on keyboard and mouse or else the keyboard will control player.

TL;DR

THE KEYBOARD CONTROLS THE WRONG ACCOUNT.

Works only for player 1 to be keyboard and mouse

1. turn on Xbox directly, make sure your controller isn't on

2. sign into Xbox with your keyboard and go to a minecraft world

3. turn on the controller and sign into a different account

I think this will work, ill see an ill reply to this one.