This article explores the importance of observing states attending the Second Meeting of the States Parties to the Treaty on the Prohibition of Nuclear Weapons (TPNW) in November 2023. It focuses on Germany, the Netherlands, and Australia to argue how the TPNW discussions can foster the nuclear disarmament discourse in countries concerned with nuclear deterrence. It advocates for the state parties to promote the humanitarian approach and the relationship between the TPNW and NATO to bring observers closer to the Treaty’s disarmament goals.