@thewingsoftruth Doodle pups are typically sold as "labradoodles, goldendoodles, Aussiedoodles, Bernadoodle and so on.
By this I mean the pups are Lab x Poodle, Golden x Poodle, Aussie x Poodle, BMD x Poodle.
But there's no oversight with doodle/designer dog breeders. No one is going to check if the "poodle" half is really a 100% poodle. Or if the Aussie is really 100% Aussie. IMHO, many doodle/designer breeders have a "eh, close enough" attitude towards breeding stock.
On the doggydna subreddit, there's been a number of doodles tested and, despite what the breeder told them, they are often not 50-50 crossbreds but can have a handful (or more) of breeds in them.
I think this can be more common with Bernadoodles. BMD are expensive and the breed has serious health issues. Using a purebred BMD for breeding will cost money and there's a chance that it'll die too early and the breeder "won't get their money's worth". Besides the majority of doodle puppy buyers will swallow whatever the breeder tells them. If the breeder tells them that their roly-poly pudgy puppy is a bernadoodle, then it's a bernadoodle.
Anyway, I think it's possible to make some basic predictions for a Labradoodle puppy, when the parents really are a purebred Lab and a purebred poodle. But since many doodles are a little more mixy than their breeders claim, it's harder to predict anything.