Change contentSize based on post type (Block editor / theme.json)

Hi,

I was wondering: is it possible to set a contentSize for specific post types.

For example: my blog post’s content should be 760px width, yet the width of a page should be 960px.

So far I haven’t found the option to configure this through theme.json.

https://developer.www.ads-software.com/block-editor/how-to-guides/themes/theme-json/#settings

The only way I can alter the width of the content of a page now (as far as I can see), is to set the alignment of a group-block to wide.

Looking forward if anyone has more info on this.