The listing, Fallout 76 PC Microsoft Store key has ended.
https://www.xbox.com/games/store/fallout-76-pc/9nkgnmnk3k3z (NOTE: IS MICROSOFT STORE KEY! NOT STEAM KEY): 1 To redeem the game, open a device with Windows 10 or 11 and search for “Microsoft Store”. 2 Make sure you're signed in to the Microsoft Store on the account you want to play Fallout 76, then select the account button in the top right corner, next to the search bar. 3 A menu will open with the option to “redeem code or gift card”. Select this option, enter the 25-character code and click Next to link the content to the account. From a Microsoft account: Redeem the code to your Microsoft account here.https://support.microsoft.com/account-billing/redeem-a-gift-card-or-code-to-your-microsoft-account-d6b2c675-9e31-f312-7ff4-21834ad22fa8