Installing Steam on Xbox – Not Possible, Use Xbox Cloud Gaming Instead

You cannot install Steam directly on Xbox—it's a PC platform.

Alternative: Xbox Cloud Gaming

1. Subscribe to Xbox Game Pass Ultimate (includes Cloud Gaming).
2. Open the Xbox app on your console.
3. Sign in with the same Microsoft account.
4. Go to Cloud Gaming library.
5. Compatible Steam games appear there—stream them.

Not all Steam titles are supported; check each game's Steam page for Cloud Gaming compatibility.