For displaying SVG files in react native projects, you need to install following packages:
react-native-svg-transformer
react-native-svg

After installing packages you need to import your SVG files like this:

import React, { useState } from 'react';
import { View } from 'react-native';
import WelcomeSVG from "assets/icons/welcome.svg"

The below example shows how to use it:

return (
    <View>
<WelcomeSVG 
    width="100%"
    height="70%"
  	/>
</View>
)

The above code will help you in displaying SVG images. You can also set image height and width based on your requirement using width and height properties.