Reddit doesn’t seem to have a strict bio detector, but they likely monitor patterns in account creation, such as repetitive bios, similar activity, or accounts created too quickly. To avoid detection when creating multiple accounts, try varying your bios significantly, different lengths, styles, and content. Add small, random details to make them look genuine. Use high-quality residential proxies and rotate them for each account. Warming up accounts with organic-looking activity can also help bypass Reddit's moderation systems.