React block renderer

How can I create an id for heading blocks in react-block-renderer?

I need to create the Table of Contents for the blog post. Click on the link and go to part of the page.
I can create them using the BlocksContent array but not inside the blocks prop.

    // content={data?.blogs?.data[0]?.attributes?.content as BlocksContent}
    blocks={{ /** I don't know how to do it here */
      heading: ({ children }) => (
        <h2 id={createAnchor(/** node to build the id */)}>{children}</h2>

please help

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