The reference links aren't part of the AST. That's why they don't show up.
But I think you know this!

I don't know of a simple way of achieving what you want to achieve.

However, the details of your references are in the AST where they are
referenced. So with this input:

### Referenzen

[1]

- [1]: https://www.youtube.com/@johnwitulski18 "John Witulski"
- [2]: https://www.youtube.com/watch?v=Rl70mXyDxII "Vorlesung Compilerbau
(5) - Bottom-Up Parsing"
- [3]: https://cisco.github.io/ChezScheme/ "Chez Scheme"

...you get this AST (reporting using pandoc-ext/logging):

(#) blocks Blocks[3] {
  [1] Header {
    attr: Attr {
      attributes: AttributeList {}
      classes: List {}
      identifier: "referenzen"
    }
    content: Inlines[1] {
      [1] Str "Referenzen"
    }
    level: 3
  }
  [2] Para {
    content: Inlines[1] {
      [1] Link {
        attr: Attr {
          attributes: AttributeList {}
          classes: List {}
          identifier: ""
        }
        content: Inlines[1] {
          [1] Str "1"
        }
        target: "https://www.youtube.com/@johnwitulski18"
        title: "John Witulski"
      }
    }
  }
  [3] BulletList {
    content: List[3] {
      [1] Blocks {}
      [2] Blocks {}
      [3] Blocks {}
    }
  }
}

...so you could write a lua filter to collect the info from the links and
output it at the bottom.

But I can't help feeling that you'd then really just be implementing your
own simple version of citeproc!

Using citations isn't too hard, but there are definitely more moving parts.
I could provide a mock-up if that would be helpful.

On Sat, 11 Nov 2023 at 18:20, Cev Ing <ceving-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

>
>
> William Lupton schrieb am Samstag, 11. November 2023 um 18:20:32 UTC+1:
>
> To prevent this, you could escape the opening square brackets like this
> (I've also put the URLs in angle brackets):
>
> ### Referenzen
>
> - \[1]: <https://www.youtube.com/@johnwitulski18> "John Witulski"
> - \[2]: <https://www.youtube.com/watch?v=Rl70mXyDxII> "Vorlesung
> Compilerbau (5) - Bottom-Up Parsing"
> - \[3]: <https://cisco.github.io/ChezScheme/> "Chez Scheme"
>
>
> I tried that, but then the reference-links stop working. I do not want to
> prevent the reference-links, instead I want both: working links in the text
> and a list of all links at the bottom.
>
>
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