Why I'm permanetly offline on my Xbox?

Have you checked to see if the setting offline mode is turned on? It could be that that is causing the issue.

https://support.xbox.com/en-US/help/hardware-network/connect-network/using-xbox-one-offline

Don't listen to Eziquiel. He's never seen the game and is copy/pasting things he doesn't understand

Go to Options>General Options>Data

Then reset everything to default.

This usually fixes this issue

Hello Afruzu how are you?

My name is Ezequiel I'm an Independent Consultant.

What appears when you try to connect your internet on your Xbox? Are there any error codes or warnings?

Yes you can play this game offline, however you need to download content from it so you can play offline.

1-Open "My Games & Apps" on the Xbox console by choosing the "My Games & Apps" tile on the Xbox Dashboard or by opening the Xbox Guide and choosing the "My Games & Apps" option.
2-Find Microsoft Flight Simulator in the "Games" section of "My Games & Apps". Note: If you are installing or pre-installing Microsoft Flight Simulator, the game will immediately appear in the "Games" section and you can do this during installation.
3-Open the Microsoft Flight Simulator "More Options" menu by highlighting Microsoft Flight Simulator under "My Games & Apps" and pressing the "Menu" button on your Xbox controller.
4-In the Microsoft Flight Simulator "More options" menu, navigate to the "Manage games and add-ons" option and open it.
5-On the Microsoft Flight Simulator "Manage Games and Add-ons" screen, highlight and open "Microsoft Flight Simulator" on the right side of the screen.
In the "Microsoft Flight Simulator" menu, navigate to and select the "Manage installation to (storage device)" option.
7-On the Microsoft Flight Simulator "Manage Installation" screen, navigate to the "World - offline mode" add-on in the Microsoft Flight Simulator base game. Note: Selecting the "World - Offline Mode" add-on will install it, while unchecking it will either uninstall the add-on or prevent it from being installed.
8-After making the changes, navigate and select the "Save Changes" option on the right side of the screen.
9-Your Xbox will automatically update the Microsoft Flight Simulator installation in the background.

https://www.windowscentral.com/microsoft-flight-simulator-xbox-offline-mode-pack

This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.'12

Wait are you saying the EA server for Battlefield 3 is permanetly offline?...... but getting back to the problem at hand. When i was linking up my EA account to my xbox i had a hard time too. All you need to do is sign in here and then all you have to do
is wait. The link will be listed below, hopefully this will help you

battlelog.battlefield.com/.../gate

Hi there. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

I sincerely do apologize for the inconvenience. As of the moment, we have a service alert status on this link for Friends and social activity, it is related to your concern where the status of friends is not displaying correctly, https://support.xbox.com/en-US/xbox-live-status.

The support team is aware of the issue already and they are working on resolving the issue as soon as possible. Please click "Notify me" to get notified once the issue has been resolved.