It doesn't seem to work. The response object is created, but retrieving the formData throws an exception TypeError: Failed to fetch....

  const data = await axios.get(url, {responseType: 'arraybuffer'});
  const response = new Response(data);
  const formdata = await response.formData(); // This is where the exception is thrown

Thanks to @DigitalBrainJS, this actually worked for me by adding the according content-type header to the native Response object headers. The "boundary" definition is required to be able to parse a form data string. See also: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type#syntax)

const response = await axios.get(url, {responseType: 'arraybuffer'});
const plainHeaders = response.headers instanceof AxiosHeaders
   ? response.headers.toJSON(true)
   : response.headers;
const nativeResponse = new Response(response.data, {
   headers: {
      'content-type': `${plainHeaders['content-type']}`,
   },
   status: response.status,
   statusText: response.statusText,
});
const formData = nativeResponse.formData();

Might be better to add all headers instead of just content-type.

@inkognitro You're right- the boundary header is required. In addition, since v1.7.0 you can use the fetch adapter with FormData response type.

const response = await axios.get(url, {adapter: 'fetch', responseType: 'formdata'});