Can not add different content widths for different blocks in theme.json, display bug with alignment control

[carolinan]

Description

If someone tries to use different content widths for different blocks in theme.json, the control in the editor
shows the numbers, but the widths do not work.

If you add this code and place a group block inside a group block,
the alignment control for the parent block displays 840 and 1100, the control for the child displays 440 and 800.
The actual width of the child is 840.

{
	"version": 2,
	"settings": {
		"layout": {
			"contentSize": "840px",
			"wideSize": "1100px"
		},
		"blocks": {
			"core/group": {
				"layout": {
					"contentSize": "440px",
					"wideSize": "800px"
				}
			}
		}
	}
}

It is unclear if this is 1) Not supported yet 2) Supposed to work but is bugged.

It is not unlikely that developers expect settings.layout to work similarly to other settings where you can add different values for different blocks.

Step-by-step reproduction instructions

1. Add the code above to theme.json
2. In the editor, place a group block. Set it to wide width and enable "inherit layout"
3. Place a second group block inside the first.
4. Enable the different width alignment controls and compare what the "maximum width" says in the toolbar option, and the actual width.

Screenshots, screen recording, code snippet

Environment info

WordPress 5.9-beta1-52296-src
With and without Gutenberg 12.0.2.

Please confirm that you have searched existing issues in the repo.

No

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[annezazu]

Curious if @jffng might have thoughts here.

[tellthemachines]

I can confirm this isn't supported yet. Layout settings aren't editable as global styles at the block level, only at the root level. The only layout-related setting that can be changed globally per-block is block spacing.

Let's consider this as an enhancement 😄