materialuiupgraded/packages/material-ui-icons/src/FullscreenOutlined.js

Material-UI's workspace package

import React from 'react';
import createSvgIcon from './utils/createSvgIcon';

export default createSvgIcon(
  <React.Fragment><path fill="none" d="M0 0h24v24H0V0z" /><path d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z" /></React.Fragment>
, 'FullscreenOutlined');