For adding friends on Roblox Xbox One from PC, go to settings > Account from your Xbox Device and Enable Cross-Platform Play. Remember to link your console Microsoft account with your PC. Then switch to your PC and login with that same account, and add friends using their username.
To connect your Roblox account to your Xbox account, you will need to know your correct user name and password. If you have forgotten your password and need to change it, click here for information on how to reset your password.
To vary the default setting to your little one:
Connect to Xbox-enabled devices. You’ll need an account to play games and access other experiences on your Xbox console, Windows PC, and Xbox mobile apps. If you don’t already have an account, you can create one for free.
You can play all of the available experiences on Roblox cross-platform with your friends even while they're playing on PC, Mac, or a mobile device. You can even see your online Xbox friends from the Friends tab in Xbox and create a party to play with them.
Yes, with a digital copy of the game you can play on Xbox and PC at the same time. There are a few things you will need to do since an account cant be playing the same game on PC at the same time as Xbox. With the account that owns the game set the home Xbox to the Xbox you would like to use.
Link an account from a game purchased on SteamOpen Steam, and then launch a game that supports Xbox account linking (for example, Gears 5).Sign in to the Xbox network when prompted.Select the account linking option in the game's menu.When the Steam account linking overlay appears, select Yes, continue.More items...