The safest country in the world for bicycling (and walking) is The Netherlands. Not surprisingly many others have begun using the Dutch CROW design principles. Some good sampling of their infrastructure here:
https://bicycledutch.wordpress.com
The U.S. has the most dangerous road system of all developed countries - for all users. Vs the average of the safest 10 developed countries per mile; Someone in a car is 4.7x as likely to be killed, riding a bicycle 9.4x and walking an estimated 22x. While most developed countries saw reductions in deaths and serious injury rates during the pandemic, the U.S. saw increases.