syncing old worlds:

Hi! My name is Ben an Independent advisor and Xbox gamer. Hope you are doing well.

Can you tell us what version of Minecraft are you playing before? If you still have access to your previous device where the world is showing, kindly try to use the sync old world feature there. Once it is succesful, go to the Xbox version of Minecraft and make sure to sign in the same account you are using for the game then choose the Sync old world.

After doing so, check if the world will now sync in the game. Please let us know how it goes so we can try to assist further if there are still problems.

Kind regards,

Ben

Everything is set to allow. My worlds are still unable to sync. I signed into my Microsoft profile on minecraft and there is no option on the ps4 to sync my old worlds.

Maybe try scrolling down till it says sync old worlds.

Are you talking about a Minecraft world? Also, what version [Xbox one(the old one) or bedrock (the latest one with cross platform)]?. Usually if you're connected to Xbox live, all worlds sync up to the cloud, if you're playing on Minecraft Bedrock edition,
when you click play, there should be an option at the bottom to sync old worlds.

You can use the Minecraft Realms standard or try the steps below first when transferring worlds.

In Minecraft (Bedrock Version), select the Sync Old Worlds button at the bottom of the worlds list in the Play menu. This finds any worlds on the device from the Minecraft: PS4 Edition and displays them below the button.

Select any of the worlds that are displayed to convert it to the Bedrock edition.

After conversion, the world will show up above the Sync Old Worlds button, along with the rest of your Bedrock worlds.