The US firearm mortality rate was 5x that of the nearest high-income countries in 2019 [0]. The US had 120 firearms per 100 people in 2018 with 80% of all homicides being gun-related [1].

Those statistics may not be wholly attributable to differences in gun laws but it seems a stretch to suggest they're unrelated.

[0] https://www.linkedin.com/pulse/us-midst-public-health-crisis...

[1] https://www.bbc.co.uk/news/world-us-canada-41488081