Every show-quality Holland Lop has the dwarfing gene. In fact, it is rare for a Holland to be within the weight limits of the standard, and not have the dwarfing gene. Some Hollands that are oversized have it too - when you know the breed well, you learn to recognize the proportions that signal it. This is also true with Netherland Dwarfs, Dwarf Hotots, Mini Rex, Jersey Woolies, and a number of other dwarf breeds.
If you want to breed quality Hollands (or any dwarf breed) you have to work with the dwarfing gene. As I said. it is a lethal gene, so a bunny that gets it from both of its parents dies within a few days of birth. Very nearly all of the Hollands that weigh less than the maximum weight listed in the standard have one copy of the dwarfing gene, and one of the regular growth gene. Breed two of these together, and some babies will get the dwarfing gene from one parent, and the regular growth gene from the other. Those are "true dwarfs," and will most likely grow up to be within the acceptable weigh range. Some babies will get the dwarfing gene from both parents; they die. Some babies will get the normal growth gene from both parents, they are the "false dwarfs." They will be a bit oversized at maturity, and have longer proportions than the true dwarfs.
Breeding a true dwarf to a false dwarf will get you some babies that are true dwarfs, and some that are false dwarfs. All of the babies will have a chance at living, though that means one parent may be pedigreed, but isn't registered (if that sort of thing is important to you).
Breeding false dwarf to false dwarf only gives you false dwarf babies, that normally can't be registered and can't be shown. You might run into the occasional false dwarf that comes from very small stock and just squeaks in under the weight limit, but the longer proportions will mean that it doesn't do well on the show table.
Well that's why I know my Holland can't be shown. She's the biggest of the 4 I have. But she's a great brood doe. I'm really curious now to see how this frosty doe turns out. They were all out playing in the snow yesterday....