Creating a minimalist vector PNG icon can be achieved using the @expo/vector-icons package in Expo. Here's a brief snippet to get you started:

import React from 'react';
import { Ionicons } from '@expo/vector-icons';

const MinimalistIcon = () => {
  return (
    <Ionicons name="ios-star" size={32} color="#3498db" />
  );
};

export default MinimalistIcon;

This code imports the Ionicons component from @expo/vector-icons and uses it to render a minimalist star icon. You can replace ios-star with any other icon from the package.

If you want to create your own custom vector icon, you can use the react-native-vector-icons package instead. Here's an example:

import React from 'react';
import { Feather } from 'react-native-vector-icons';

const MinimalistIcon = () => {
  return (
    <Feather name="star" size={32} color="#3498db" />
  );
};

export default MinimalistIcon;

This code imports the Feather component from react-native-vector-icons and uses it to render a minimalist star icon. You can replace star with any other icon from the package.

Note that both packages provide customizable icons, so you can adjust the size, color, and style to fit your needs.