contentSize doesn’t work in theme.json file

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On WordPress `6.5.2` version, in the `theme.json` file, I have the following code

{
“version”: 2,
“settings”: {
“layout”: {
“contentSize”: “800px”
}
}
}

But it doesn’t work if editing any Post or opening Site Editor

**Post Editing**

[Screenshot – Post Editing](https://ibb.co/1Txg7nh)

**Site Editor**

[Screenshot – Site Editor](https://ibb.co/8MNfpDL)

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