We understand that our choice of words may have been confusing but it looks like you didn't follow the links. None of these require KYC but every dex requires you to "sign up" or "sign in" somehow, even if it's just with a metamask wallet or ledger address. Feel free to ask us for help in understanding how these DEX work as it seems you are a bit confused about them. We also can't recommend the DEX you you posted as we've never heard of it and the volume and liquidity looks worse than even our smallest picks. Good luck!