Look at Florida's winter wave of Covid cases vs Massachusetts. The curves are basically identical, despite vastly different pandemic policies.
In other countries yes, but in the USA, are there any real data points that can argue that states with strong lockdowns did better than states without?
https://www.nytimes.com/interactive/2020/us/massachusetts-co...
https://www.nytimes.com/interactive/2020/us/florida-coronavi...