upload.js

const uploadPicture = async (staksName, uri) => {
  const body = new FormData();
  body.append('file', {uri, type: 'application/octet-stream', name: 'file'});
  const response = await fetch('https://postman-echo.com/post', {
    body,
    method: 'POST',
    accept: 'application/json',
    'Content-Type': 'multipart/form-data',
  });
  const data = await response.json();
  console.log({response, data});
  return data;
};

uploadPicture('content://media/external/images/media/19520');