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All reports can make statistics say what the authors want and back it up with figures. Lockdowns may not have saved lives due to CV19 but they certainly helped prevent hospitals being totally overwhelmed and that may save other lives for other causes of admission.
It's also true that populations affect how CV19 progresses in that population and where there is an older, less fit, overweight, multigenerational mix the affect is worse. It is also possible that some parts of the world have a less virulent form of the virus. Population behaviour can also have an effect so countries like Japan where to suggest isolation and certain businesses close (also they wear masks more in other situations e.g flu) leads to isolation and businesses closing. Compare to western countries where even having rules they get ignored or challenged.