When looking at deaths from dog attacks it seem the US lumps all deaths from bully dogs under 'mixed pit' breed.
Dog Bite Statistics: By Breed, Fatal Dog Bites, and States With The Highest Fatalities
From 2010 to June 2021, there were 430 fatal dog bites, with 185 of those coming from pit bulls, and another 41 that were pit bull mixes.
60% had pit bull in their bloodlines (either full-blooded or a mix)
7% had Rottweiler in their bloodline
4% had German shepherd in their bloodline
Top Three Breeds Responsible for Fatal Dog Attacks
Pitbull – 185 deaths
Pitbull Mix – 41 deaths
Rotweiller – 26 deaths
Pit bulls are a group of dogs that include a mixture of any of the following breeds: American pit bull terrier, American Bully, American Staffordshire terrier, Staffordshire bull terrier and the America Bulldog. These breeds of dogs are inherently aggressive when provoked and so they were cross bred to develop the best fighting dogs
These dogs can weigh anywhere from 35 pounds to 100 pounds depending on the breeds that are mixed. Considered the most aggressive dog in America by most, pit bulls and pit bull mixes account for nearly 60% of all dog attack fatalities despite making up only 6% of the dog population
Wiki:
2018 literature review with meta-analysis by breed, focusing on dog bite injuries to the face, head and neck, concluded that "of the cases in which the breed was known, the Pit bull was responsible for the highest percentage of reported bites across all the studies followed by mixed breed and then German Shepherds," and that "injuries from Pit bulls and mixed breed dogs were both more frequent and more severe."[3][4]