I don't see any information on the website either. But since I am on their Telegram group - https://t.me/BitzTalkEn, I asked one of the admins to DM me the list of available mirrors, and they sent me the official links. But yes, I agree with you that Bitz should have a dedicated page for the list of mirror domains. I assume they didn't create any list because they haven't taken many domains yet. There are only two mirror domains available at this moment in case of an emergency, while other casinos might have half a dozen mirror domains.