Is there any Seamless Coop matchmaking group for pvp arena?

I searched a lot but I couldnt find any discord server, subreddit or any group in social media where people share a password of seamless coop to gather to pvp. Do you know any?

I like pvp but I dont like too much invasions because of constant gank squads and non experienced players in pvp playing really bad in an unfunny way, but many times I invaded a world which people were gathering in an arena for pvp. I also tried to make my own arena attracting invaders but for some reason absolutely no one invades me in any of my characters in seamless coop, it happened only twice in more than 600 hours into the game.