Sui’s reported milestone is its first native quantum-safe transaction on Devnet, using ML-DSA-65 signatures. Devnet validators can verify them; the article says native ML-DSA-65 account support remains off on Testnet and Mainnet (The Defiant, DefiantNews).
The stated roadmap is native ML-DSA-65 accounts on Testnet by the end of 2026, followed by Mainnet account authentication targeted for Q1 2027, subject to security audits and Testnet feedback (WuBlockchain, The Defiant).