I think maybe I see your point, that several nations have Nukes that are under NATO control.
https://www.nato.int/nato_static_fl2014/assets/pdf/2020/2/pdf/200224-factsheet-nuclear-en.pdf
NATO Allies retain political control of all aspects of nuclear decision-making. The
Nuclear Planning Group (NPG), founded in 1966, is the main forum to discuss
nuclear issues within NATO.
While the North Atlantic Council is the ultimate authority within NATO, the
NPG acts as the senior body on nuclear matters.
The NPG reviews the Alliance’s nuclear policy, including the safety, security and
survivability of nuclear weapons, and communications and information systems.
Irrespective of whether or not they have nuclear weapons, all Allies are members of
the NPG with the exception of France, which has decided not to participate.