Mouse and Keyboard doesn't work on the new Xbox Cloud website?

Thank you.
Just to confirm, is Fortnite installed on your console, or are you playing via cloud gaming?

This question is asked because cloud gaming doesn't support keyboard and mouse.

However, if you have the game installed, could you try another game compatible with mouse and keyboard and check if the issue persists or not?

Below, I'm going to share a website that has a list of every Xbox game compatible with keyboard and mouse, try one of that list besides Fortnite:

https://www.purexbox.com/guides/all-xbox-games-with-mouse-and-keyboard-support

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

Keyboard and mouse control is coming to cloud gaming on PC. Have a look here https://www.trueachievements.com/n50142/xbox-cloud-gaming-mouse-keyboard-support

the xbox cloud gaming on keyboard and mouse

Multiple news sites reported that Microsoft announced keyboard and mouse support coming to Cloud Gaming (xCloud) a year ago at Xfest. Two examples below - IGN and The Verge. Seems odd that I can't find any news on it since then and any community posts I've seen here or other places like Reddit just get stonewall responses by people who either don't even seem to be aware of that announcement or who are apparently deciding to ignore it for some unknown reason.

Xbox Cloud Gaming Finally Gets Mouse and Keyboard Support - IGN

Xbox Cloud Gaming is getting mouse and keyboard support and latency improvements - The Verge

Would be great to hear any kind of update on whether this is still coming from someone actually in the know. Keyboard and mouse support for xCloud when run on a PC (at least) would be absolutely amazing and I was psyched to read that announcement before!

Seeing as Sony is bringing out a handheld device for (semi-)cloud gaming, it would be great to see MS take a leap forward by playing to one of their strengths which would be to include (or significantly strengthen depending on your view point) the PC market in the cloud gaming sector by having native keyboard and mouse support.

The same problem here using PS5 Dualsense, the mouse cursor appeared on the left side of the screen and I can't play the game anymore, the controller doesn't work.

I tried to contact Xbox Support, but they don't know how to help.

I've played with Dualsense for a week without any problem.

Probably we will have to wait for the Mouse / Keyboard support on Cloud Gaming or try to create a new Xbox account.