I can not activate the code for the game.

What error message/error code do you receive when you try redeeming it?

That game is region locked, so usually the issue is region related. If your account region and your physical location don't match, or the game is not available in your region, the code will not work.

I also called in support of Microsoft. I was told that my code is already activated. How can I check on which device and when the game code was activated?

Hi, I never activated any Game Pass code on Xbox before, the codes are just not working, no one can activate them, neither my friends. I gave the codes to some of my friends but it still doesn't work

By all indications, Starfield codes are not active yet.

The game has not been released, so your code is not active. If you wish to download the game, you can do so through the Xbox app without putting in your code

When you buy any code whatever Xbox Live Gold, EA Access or Xbox Game Pass. So you have to activate it by the end of the year, if you do not activate it by the end of the year, the code will fail and you will not get any money back or you can claim the
code. so always activate the code in that year. In short, all the codes are for the current year if you would activate the code for 1 month of membership on the last day of the year, so you will be active in January.