@Marzena4 I contacted Airbnb support through Twitter, and here is the reply I received.
Thanks for writing in Joa! At this time, those services have been deactivated with the newest update applied. Our Product Team is always working towards improving the site and our users voice has been influential to development. We've taken note of this and we'll share it with our Product Team. Stay tuned for updates!
Unfortunately, it isn't just me who is affected. I really thought this was a good service to offer. It helped me to respond quickly to reservation requests and other messages.