Posted this to technical issues, posting this to bug report as well:
All chat channels right now seem to be down for most people, including Whisper, Group, Party, Alliance and even Mail. I gathered info from the 2 people that could see my general chat, and from others that i have another form of contact with outside game thru a discord. This includes lobby actions not working through the chat box too. Also cannot invite or receive invites, but i will receive a notification that it timed out.
Edit: I did send a twitter message to the official pso2 NA twitter, and submitted a ticket thru supports