According to Oculus Blog, chatting with Messenger friends through your headset does not affect your Oculus privacy settings. You will still be able to use Oculus Chats to send messages to your friends with your Oculus username. Facebook revealed in the fall that he would bring Messenger to Oculus, shortly after announcing that all Oculus headsets would eventually require a Facebook account to use.
The gradually rolling v25 software update also introduces a feature called App Lab. This will give developers a way to distribute their apps and games outside of the Oculus Store without users having to load them aside. Facebook suggests this will allow it to maintain a high level of quality in the store while providing a safe and secure way for developers to share creations that might be more unrefined or experimental.
While these apps might not be in the Oculus Store, you can still search for them if you know the exact name and they’ll show up in the App Lab section of the results. Developers can also share their apps with a URL. Any App Lab games or apps you purchase will be added to your Quest library and receive automatic updates.