They do look like leaves - too bad they stink - ;))
It seems that mushrooms have been abundant this year.
We have also had a large amount. Letting them die off naturally does indeed leave a stink behind. I’ve found toppling them before they grow works much better. It’s hard to do that, but best.
We had quite the mushrooms here too this year. We always knock them out of the ground before letting them just dry up naturally. We have been worried if the grand-doggies were here that they might eat them.