To get high-definition vector icons in PNG format, you can use the @react-native-vector-icons package. Here's a brief snippet to get you started:

import { Ionicons } from '@react-native-vector-icons';

const App = () => {
  return (
    <View>
      <Ionicons name="ios-star" size={50} color="#007bff" />
    </View>
  );
};

In this example, we're using the Ionicons component from @react-native-vector-icons, which provides a wide range of icons. You can replace Ionicons with any other icon from the package.

Make sure to install the package by running npm install @react-native-vector-icons or yarn add @react-native-vector-icons.

If you need more control over the icon's appearance, you can use the style prop to customize its size, color, and other properties. For example:

<Ionicons name="ios-star" style={{ fontSize: 50, color: '#007bff' }} />

This will set the font size to 50 pixels and the color to #007bff.

Note that @react-native-vector-icons supports various icon fonts and glyph maps, so you can use it with different icon sets.