How to get file from URI | Expo | React Native

I have ejected project of the expo.

After changing info.plist, now I am able to get my app in the list of "open with app list" and actually able to open that file with my expo(React native app).

App.js

Linking.getInitialURL().then((url) => {  if (url) {        console.log(url);    }}).catch(err => console.error('An error occurred', err));

this code is giving me this URL.

file:///private/var/mobile/Containers/Data/Application/7E55EB55-7C49-4C0C-B4CB-63AC4F49689E/Documents/Inbox/matters-3.csv

So, that means now I have URL of the email attachment, but How am I able to get the data of that csv string in my app?

So I am assuming, when I click open with my app. The URL that is passed into my app from the system is actually a copy of the document that is placed somewhere in our app’s directory.

But when I trying to access this file with Expo.FileSystem. readAsStringAsync it's giving me an error says, the file is not readable.

is there anything to do with storage permission?

Need Help....?