I believe the current answer is yes. Certainly the Ukrainians are on board with this plan. The current damage and loss of life and health in Ukraine is already

I believe the current answer is yes. Certainly the Ukrainians are on board with this plan. The current damage and loss of life and health in Ukraine is already larger than a megaton bomb placed over a large-ish city. Also, the US & NATO voiced publicly their planned response to the usage of a much smaller (kiloton range) nuclear device, namely the complete destruction of the Black Sea Fleet. They did so in the usual way of making former generals speak to the media. It is also important to notice that it's not US/NATO/whoever's decision. The Ukrainians will fight with whatever they have available, a short talk with anyone in the country makes this crystal clear.