We have the Dangerous Dogs Act which has only 4 breeds listed. The last breed that was added to the list was in 1991.
Perhaps the Dangerous Dogs Act should be abolished, if there are no such thing as dangerous dogs, but as long as the Act remains then surely it should be relevant and up-to-date, and the American Bully XL should be on it.
The argument is a bit like the one of "Guns are not dangerous, it's the owners that are the problem". Guns are licensed and regulated, dogs are not (not before a problem, anyway). In fact, it's the combination of the owner and the weapon that's the issue, and an American Bully XL is a weapon, more so than a chihuahua or a labrador, and needs to be regulated to keep normal people safe.