Fetch data in React TinyMCE custom dialog

Is it possible to create a custom dialog (React TinyMCE) that fetches data from an API and lists items for the user to select one? Appearently, TinyMCE only allows me to create a custom dialog with static data.

const internalLinksDialog = editor => ({
title: 'Internal Links',
body: {
    type: 'panel',
    items: [
        {
            type: 'input',
            name: 'search',
            inputMode: 'text',
            placeholder: 'Search internal links',
        },
        // ...render a list with items
    ],
},
initialData: {
    search: '',
    items: [], // ...data fetched from an api
},
onSubmit: api => {
    const data = api.getData();

    editor.execCommand('mceInsertContent', false, `<p>${JSON.stringify(data)}</p>`);
    api.close();
},
});