Gutenberg LinkControl suggestionsQuery not working

I have a link control like so:

import { __ } from "@wordpress/i18n";
import {
  __experimentalLinkControl as LinkControl,
} from "@wordpress/block-editor";
import "./editor.scss";

export default function ({ attributes, setAttributes }) {

  return (
          <LinkControl
            suggestionQuery={{
              type: "post",
              subtype: "page",
            }}
          />
  );
}

However, typing into the search input shows all post types (I want it to just show pages). The documentation says to use it as so:

suggestionsQuery

Type: Object
Required: No
Controls the query
parameters used to search for suggestions. For example, to limit a
query to just Page types use:

<LinkControl
    suggestionQuery={ {
        type: 'post',
        subtype: 'page',
    } }
/>

I think I’ve followed that pretty nicely.

The only question in my mind is, the docs also state:

Data sources

By default LinkControl utilizes the __experimentalFetchLinkSuggestions API from core/block-editor in order to retrieve search suggestions for matching post-type entities.

By default this provides no functionality and so you must implement and provide this in your own Editor instance (example).

The example:
https://github.com/WordPress/gutenberg/blob/65c752816f46a9334b84f4801d80dea00ed76fba/packages/editor/src/components/provider/use-block-editor-settings.js#L114-L115

I cannot wrap my head around. It also may not be why my code isn’t working. Would anyone be able to show how I can make this work?