The Victorian Bulldog is the result of a mix of English Bulldogs, Bullmastiffs, Bull Terriers, and the Staffordshire Bull Terrier.
Kenn Mollett, one of the breeders, believed that the bulldog's original features had been lost somewhere in modern times.
So Kenn Mollett wished to recreate the original bulldog from history, similar to an English bulldog but with fewer health issues.
In 1980, Kenn Mollett selected English Bulldogs, Bullmastiffs, Bull Terriers, and Staffordshire Bull Terriers, to create a new Bulldog.
That might be the reason this breed is not so famous. You might have difficulty finding this breed.
There are only two small registries, the Dog Registry of America and the American Canine Association, who have registered this breed to maintain and record this breed.