Can you create an unofficial subreddit for something if the official already exists?

(Desktop, I guess) There’s an app I use but on their official subreddit, they delete posts and hide comments that criticize, and those posts aren’t aggressive. For example, a thread on wishing something was reverted got deleted within 2 hours.

So my question is, since they already have an official subreddit, can I create an unofficial subreddit with less censorship? Can it get taken down?