Fix: Global styles affect all form elements ( Form Block )

[Rishit30G]

What?

Closes #56784

Why?

The styles changes for the form element is affecting other block styles

How?

This PR removes the "__experimentalSelector": "form" from the form's block.json

Testing Instructions

• Open any template in the Site Editor.
• Insert a form block into your template.
• Insert a block with form elements. Such as the Table block and the Embed block.
• Open the Global Styles and select Blocks > form.
• Change the style.
• The styles of form elements other than the form block should also change.

Screenshots or screencast

Before

Screen.Recording.2025-06-12.at.10.00.09.AM.mov

After

Screen.Recording.2025-06-12.at.10.09.11.AM.mov

[github-actions]

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Co-authored-by: Rishit30G <[email protected]>
Co-authored-by: t-hamano <[email protected]>

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[t-hamano]

LGTM!

I believe there should be no reason for this block to need the __experimentalSelector.

[t-hamano]

Unfortunately, it seems that recent changes in the core are causing E2E tests to fail. Let's wait until that issue is resolved.

[t-hamano]

Unfortunately, it seems that recent changes in the core are causing E2E tests to fail. Let's wait until that issue is resolved.

This is a known issue and is not related to this PR, so let's merge this PR. See https://wordpress.slack.com/archives/C02QB2JS7/p1749712750681339