To create a minimalist vector notification design, you can use a combination of libraries and tools. Here's a brief overview:

1. Vector Graphics: Use a library like @expo/vector-icons to create vector icons for your notifications. This library provides built-in support for popular icon fonts and allows you to create custom Icon components from your font and glyph map.
2. Design Tools: Utilize design tools like Figma, Sketch, or Adobe XD to create your notification design. These tools offer a range of features, including vector graphics, typography, and color management.
3. Color Palette: Choose a minimalist color palette that aligns with your app's branding. You can use online tools like Adobe Color or Color Hunt to find inspiration for your color scheme.

Here's a simple example using @expo/vector-icons to create a basic notification icon:

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

const NotificationIcon = () => {
  return (
    <MaterialIcons
      name="bell"
      size={24}
      color="#333"
      style={{ marginRight: 8 }}
    />
  );
};

export default NotificationIcon;

This code snippet creates a basic notification icon using the MaterialIcons library. You can customize the icon's size, color, and style to fit your design needs.

Remember to test your notification design on different devices and platforms to ensure it looks great in various contexts.