A member of the Knights community, ZaRR, has created an IRC chatroom for Knights, which you can enter using this link: https://web.libera.chat/?channels=#knights
There is also the old Knights Forum, which unfortunately has now been shut down, but the archives are still available for reading: Knights Forum Archive
When the game eventually releases on Steam, we will be able to set up a forum for the game within Steam itself. Stay tuned for that.