Xbox uses voice chat (party chat). There is no text chat in Roblox on Xbox One. It was removed awhile back.
Steps
You can view your online Xbox friends from the Friends tab in Xbox and create a party to play with them. To view all of your friends, or accept/reject friend requests, you can do so by logging into your Roblox account on another platform such as PC or Mobile.
Provided you meet the above condition, simply follow the below steps to enable the Spatial feature:
To see the default emotes, hit the “/” key to chat and try typing in the following commands:
One of the many great ways to communicate with your fellow players is to use the in-experience chat feature. To start chatting, press the / key on your keyboard. This will open up the chat window, if enabled by the developer, and a chat-bar where you can type what you would like to say.
Text Chat has never been available on Xbox at a platform level (Our Xbox app is over 3 years old). This is due to stringent privacy policy implications that require us to add additional complexity to Text Chat. This change does not impact other platforms.
You'll need the Xbox mobile app on your phone, but you can boot up Discord on your phone or PC to hop in a voice call or channel. Once you're in a call, select the new option to Transfer Audio or Transfer Voice to your Xbox. You should get a final confirmation prompt in the Xbox mobile app and then be good to go.
Change chat privacy settings on Roblox In Roblox, click on the gear icon and go to its Settings. Go to Privacy. Now set the setting to Everyone for Who can message me, Who can chat with me, and Who can chat with me in-app.
Changing Privacy and Chat SettingsLog into the account. (If you can't log in, try these steps for recovering your password.)Go to account Settings. Browser - find the gear-icon located at the upper-right corner of the site. ... Select the Privacy tab.Adjust the Contact Settings and Other Settings.
Fix 2: Check Roblox settings Launch Roblox, play the game that you find audio missing. Click the Roblox logo icon at the top-left corner of your Roblox window. Switch to the Settings tab. Make sure your audio is not muted and the Volume is not too low.
1:055:06ROBLOX VOICE CHAT FULL SETUP TUTORIAL! HOW TO ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo what you guys want to do is just click on account info scroll down until you see this buttonMoreSo what you guys want to do is just click on account info scroll down until you see this button which says verify my age by clicking verify my age you will be completing an id verification.
On the left side of the menu, there will be an “add friend” option and a request can be sent from there. If they add you, they will only appear on your friends list on the Roblox main menu. As you are adding them via Roblox, they will not appear on your Xbox friends list.
Once a friend request is accepted, you can effortlessly join their game by going into their Xbox profile at any time. You will not technically be friends inside of Roblox by doing this, but joining friends’ servers will be much less of a hassle.