The subreddit r/Antiwork has gathered a lot of support over the last year, especially since the beginning of the Great Resignation. And even though not all of the attention was positive, the buzz has certainly helped to spread its message, and even take the movement to other platforms.
There's a Facebook group called Anti-Work. It's not connected to the subreddit, but shares a lot of the same values. The group's 'About' section says it welcomes "all things related to anti-work and late stage capitalism", and you can definitely see a wide variety of topics in its posts.