Issue Description

The documentation for the RichTextToolbarButton component is missing and the current link leads to a 404 error page. Additionally, this component has been deprecated since WordPress 5.3 and should now be accessed via wp.blockEditor.RichTextToolbarButton, but the Format API guide does not mention this change.

URL of the Page with the Issue

https://developer.wordpress.org/block-editor/how-to-guides/format-api/

Section of Page with the issue

The section referencing RichTextToolbarButton, where developers are guided to use this component when creating custom formats. The broken link currently points to:

https://developer.wordpress.org/block-editor/reference-guide/packages/packages-block-editor/src/components/rich-text/

https://tinyurl.com/24ktxyjm

Why is this a problem?

• The link to the component documentation returns a 404 page.
• The component is deprecated, but this is not mentioned in the guide.
• Developers are left without accurate information about how to use or import RichTextToolbarButton.
• This causes confusion when following the Format API documentation and may lead to incorrect implementation.

Suggested Fix

• Add a note to the Format API guide explaining that RichTextToolbarButton is deprecated since WordPress 5.3.