gblock-settings-panel.js

import { InspectorControls } from '@wordpress/block-editor';
import { PanelBody } from '@wordpress/components';

const BlockSettings = () => {
  return <InspectorControls>
    <PanelBody
      title="My panel body"
    >
      Hello world
    </PanelBody>
  </InspectorControls>
}

export default BlockSettings;