i’m not aware of anybody who allows public signups and is interoperating with bsky.app yet (besides Bridgy Fed which will create an ATP identity for your ActivityPub identity), but I’m pretty sure it is possible because I follow people there who appear to be doing it for themselves.
see also my reply to you in another thread.
What you want is not an “uncensored” server, but rather a server that is moderated in a way that you find acceptable.
There is no such thing as an “uncensored/open” server. Or, when there is, it can’t last long. Every open server needs to delete some things, because if they don’t, their disk will soon be full of spam and CSAM and then the server will go away. Some servers claiming to be “uncensored” might allow nearly everything besides those two categories, but they tend to quickly become nazi bars.
Sorry i don’t have any specific suggestion, but of the 61 servers listed here hopefully there is one with a moderation policy that is to your liking.