How to expand a reference in a link component in React Portabletext serializers

import { HiLink } from "react-icons/hi";
import { LINK_REFERENCES } from "../config";

export default {
  name: "link",
  type: "object",
  title: "Link",
  blockEditor: {
    icon: HiLink,
  },
  description: "You shall only use one of these – trust me :)",
  fields: [
    {
      name: "external",
      type: "url",
      title: "URL",
      validation: (Rule) =>
        Rule.uri({
          scheme: ["http", "https", "tel", "mailto"],
          allowRelative: true,
        }),
      hidden: ({ parent, value }) => !value && parent?.internal,
    },
    {
      name: "internal",
      type: "reference",
      to: LINK_REFERENCES.map((type) => ({ type })),
      hidden: ({ parent, value }) => !value && parent?.external,
    },
  ],
};

export default {
  title: "Block Content",
  name: "blockContent",
  type: "array",
  of: [
    {
      title: "Block",
      type: "block",
      styles: [
        ...
      ],
      lists: [
        ...
      ],
      marks: {
        decorators: [
          ...
        ],
        annotations: [
          {
            type: "link",
          },
        ],
      },
    },
    {
      type: "figure",
    },
    {
      type: "attachment",
    },
  ],
};

const link = ({ children, mark }) => {
  console.log({ mark });

  return <Link link={mark}>{children}</Link>;
};

{
  "mark": {
    "_key": "e602ef2fe9a9",
    "_type": "link",
    "internal": {
      "_ref": "127465e0-3999-4a66-b54d-fa42b0f020ce",
      "_type": "reference"
    }
  }
}

_type == "richText" => {
    _type,
    _key,
    headline,
    "content": content[] {
      ...,
      markDefs[] {
        ...,
        _type == "link" => {
          "internal": internal->slug.current,
          external
        }
      },
      _type == "attachment" => {
        ...,
        asset-> {
          extension,
          mimeType,
          size,
          url,
          "name": originalFilename,
          "createdAt": _createdAt,
          "updatedAt": _updatedAt,
        },
        author->,
      },
    }
  }

      markDefs[] {
        ...,
        _type == "link" => {
          "internal": internal->slug.current,
          external
        }
      },