[Bug]: `Enable breadcrumbs for your theme` does nothing

[pls78]

Prerequisites

• I've read and understood the contribution guidelines.
• I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened

In Yoast SEO -> Settings -> Advanced -> Breadcrumbs section there's the Enable breadcrumbs for your theme toggle, which should control if breadcrumbs are rendered (both on the frontend and in the schema output). It however doesn't work at all.

Step-by-step reproduction instructions

1. Go to Yoast SEO -> Settings -> Advanced -> Breadcrumbs
2. Switch Enable breadcrumbs for your theme to off
3. Edit a post and insert the Yoast Breadcrumbs block
4. Visit the post in the frontend and verify:

Expected results

1. No Yoast Breadcrum block output should be present in the frontend
2. No BreadcrumbList schema piece should be present in the page source graph

Actual results

1. The Yoast Breadcrum block output is present in the frontend
2. The BreadcrumbList schema piece ispresent in the page source graph

Screenshots, screen recording, code snippet

No response

Which editor is affected (or editors)

• Block Editor
• Gutenberg Editor
• Elementor Editor
• Classic Editor
• Other (please specify in additional info)

Which browser is affected (or browsers)

• Chrome
• Firefox
• Safari
• Other (please specify in additional info)

Device you are using

No response

Operating system

No response

PHP version

No response

WordPress version

6.9

WordPress Theme

No response

Yoast SEO version

26.8

Gutenberg plugin version (if relevant)

No response

Elementor plugin version (if relevant)

No response

Classic Editor plugin version (if relevant)

No response

Relevant plugins in case of a bug

No response

[pls78]

Relevant Slack thread here.
it seems that neither breadcrumbs-enable (the option which should control the breadcrumbs) nor isBreadcrumbsDisabled (used in React) control anything