It's entirely possible that it doesn't have a huge effect on the death rate, though. It almost seems like there are two seperate but linked sets of outbreaks: one in the general population with a low death toll, and one in places like nursing homes and hospitals with a high death toll. Social distancing measures targeting the general population don't appear to have so much effect on the other, more deadly spread.
That depends on which social distancing measures you're referring to. The results of contact tracing indicate that large indoor gatherings such as concerts, nightclubs, and sporting events do cause a lot of virus transmission. But there has never been any direct evidence that closing beaches and parks has a significant effect.