Xbox One: cloud gaming option not appearing in the store

Also, are you from the US? Some countries are not able to play cloud gaming so far. To see if your country/region supports cloud gaming, please refer to:
https://www.xbox.com/en-US/regions#xboxgamepass

Not all countries that supports Game Pass Ultimate supports cloud gaming.

Hello, MrArtanis. Thanks for reaching out. I'm Lucas, an Independent Advisor and a Microsoft user just like you. I'll be glad to help you out.

Microsoft Flight Simulator was added to cloud gaming on Xbox consoles, so it should appear to you.

Are you trying to find it through the Game Pass library? Xbox > My games & apps > See All > Full library > Xbox Game Pass?

Try finding the game through the Game Pass library without searching for it. If you still can't find the game, please let me know.

Im only trying to transfer my saved game the game is already purchased on the xbox one but cloud just wont appear as an option

The option appears for those who are using cloud gaming, could you send a screenshot of the options that appear?

Hi Amy, my name is Rodrigo. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

I am sorry to hear that.

You can try to recover them from your XBOX Cloud.

Launch the Minecraft game on your Xbox Console and navigate to the "Play" menu.

Locate and select the "Sync Old Worlds" option.

A list of worlds stored in the Xbox Cloud will appear. Find your deleted world in this list.

Once you've found it, choose the "Download" option to restore the world.

If your world doesn't appear in the Sync Old Worlds list, it won't be possible to recover it.

Let me know if it works!