How to login to Facebook using react native for web platform - react-native

I'm trying to figure out how to implement a facebook login via a react-native for a web app. I can find lots of info on how to do this for IOS and Android, but nothing for a web app. I created my project using expo and also installed firebase, but I can't find enough info to tie all this together for a web app. I don't think it will matter, but I'm also using typescript. I would provide some code, but I can't even find a solution that compiles at this point.

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Using Expo's Google authentication integration vs react-native-google-signin

I'm building my first React Native app and I want to have Google signin.
I first went down the path of trying to integrate the library react-native-google-signin - seemed like a promising library! But then very quickly I got mired in problems with my development environment and figuring out Expo development builds. I never quite got it working.
Then I tried Expo's Google authentication integration, and I've gotten that working, at least on web and iOS via Expo. It returns the logged-in user's Google access_token, which I think is all I'm needing (I currently don't need access to any other of the user's Google data).
My main question is: what are the drawbacks or limitations of using Expo's authentication option, or, why would I want to use the react-native-google-signin library despite its much greater added complexity? Is the Expo option going to break when I try to officially turn my app into a native iOS app?

Instagram private API in React native using Expo cli

Can anyone link any documents on using Instagram private API or Instagram web API with react native Expo Cli. I read about it and didn't find a way to do it due to the need for native code. However, I am unable to use XCode for several reasons.
Does anyone have a way to integrate or is anyone able to find any documents about using mentioned APIs (or modules however you want to call them) with Expo (problem lies mainly on the nodejs-mobile-react-native module as far as I have understood). Or is anyone able to link another framework with the capabilities of building Android and iOS applications with the same code or am I asking for impossibilities? I have tried flutter with flutter_insta but it has the limitation of getting only public account data etc.
Any help will be appreciated!

Can we develop a web and mobile application (Android, iOS, web) with single code base by using React Native?

Can you please help with this.
I am trying to develop mobile and web apps using react native with single code base for web, android and ios. Can we Develop Web and Mobile Application with single code base by using React Native?
The simple answer is yes. However, there are a lot of caveats that you could encounter along the road with certain device requirements and functionality where you may have to write conditional code, but it could still stay in the same codebase.
The easiest way to get started is by using Expo (https://expo.io), which would let you get started with a project that could be run on Android, iOS, and the Web (via React Native Web) all with very minimal setup on your part.

How to convert React-Native app to web version?

I have already completed a React-Native app. (And I used Firebase in app for backend.)
And there is 2 Figma files for both app & web version. How can I build web version in same style with web Figma design? App Figma and web Figma design are almost same.
How to convert it? I heard that "react-native-web" is useful for this. But all related blogs are videos are for creating app & web from scratch. I want to know how to convert pre-made React-Native app to web version. And after convert, can I reuse Firebase integration that has already used in app?
Anyone can explain the procedure step by step or send some links? Just hint will be also great appreciate.

Real technical advantages of React Native over Web

I thinking about real technical advantages of creating React Native app over web SPA. I figured out that only 1 advantage could be - it's saving and loading data in phone store. Another things like, for example, access to GPS, camera, etc are also available in JavaScript Web. So, that is real technical advantage of using React Native over Web?
Overall, it really depends on what your application is for...
If your Application will be used by mobile users only, then React Native is a perfect solution. However, if you want an application with a Web presence, so users can use it on Desktops etc - then it wouldn't really be suitable unless you did both a Web SPA and a mobile app.
For example, if I were to create an accounting app - which will be used by users on Mobiles and Desktop, then perhaps I'd consider building a SPA which is mobile friendly or both SPA and an App with an API for both.
If you were building a tracking app, which will only be available for mobile - then go for it.
If your users will be using desktop, then you can build it perhaps in React and when you get to React Native you know the react library!
React Native in itself builds both iOS and Android Apps, so instead of creating a 'hybrid' app (which includes webviews) or a native App in both iOS and Android - you only create one code base and build it to your chosen OS. This saves alot of development time. As the community is open source, alot of upgrades happen and there is alot of help online if you encounter an issue.