[Governor Dinwiddie]

Those mushrooms have a symbiotic relationship with the roots of Norway spruce. In the autumn, if you find any mushrooms growing in the general vicinity of a Norway Spruce, you can bet they are Death Cap mushrooms. Remove them from the reach of any animals nearby. And these mushrooms grow fast, and can spring up overnight, in the blink of an eye, so monitor the situation.

[Fungi]

Though it does appear under conifers, it is mainly ectomycorrhizal with oaks. https://www.mushroomexpert.com/amanita_phalloides.html

the US species is likely not the same as in Europe.