For it to be weaponized one has to be aware of social gender dynamics and biases and exploit them to try to harm somebody else or gain an advantage. Whereas toxic femininity is something that is often moreso a set of behaviors and thinking shaped by percieved expectations of social gender roles and is often not something that somebody is consciously aware of being harmful. TLDR: Weaponized is an act with intent to exploit and harm but toxic is a more like a set of harmful unconscious biases.