Is there any way to hijack the section (or similar tags) in MDX and re-render them as custom components?

[nmnmtttt]

I want to edit text on the rendered page. I hope to hijack block-level elements to enable custom rendering. Implement hover selection, and achieve the effect of editing on the rendered page by modifying the original text. I tried to directly register the 'section' element, but it doesn't seem to be successfully registered. How can I achieve the desired effect? I am using the hydrate method to render the generated text.

[remcohaszing]

Please elaborate? What do you mean by hijacking? What did you try? What’s not working? Do you have a reproduction?

[nmnmtttt]

this is my origin text
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please forgive me use image
if i write "section" tag it can't be render to comment area
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and i config like this
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the code doesn‘t act in my CustomComponent and
there is no any log in my CustomComponent。