Hideo Kojima's Xbox Project Is Still Underway - Report - GameSpot

As of a couple of weeks ago, his Xbox collaboration is still going.
Death Stranding is a PlayStation 4 exclusive from Hideo Kojima's new studio.

Hideo Kojima is working on a new Xbox game - Polygon

The Sonic Dash game has been downloaded 100 million times

News - July, 2021

Hideo Kojima's Xbox project was 'still on a couple of weeks ago', it's claimed

They Want Hideo Kojima's Xbox Game Canceled?

Hideo Kojima Cancelled a Game Because It Was Too Close to 'The Boys

Is it just me or is anyone else confused by the opinions and mindset of fans these days : r/metalgearsolid

Xbox Games Studios + Kojima Productions Announcement

P.T. (video game) - Wikipedia

Hideo Kojima Could Make, Release an Xbox-Exclusive Game Soon