OK. Now someone's really deep into the magic mushroom stash.
Dokdo is substantially smaller than the Invincibles and has a well deck that can take two LCACs and consequently occupies a large slab of the hull. It's designed for ten SH-60-class helicopters, each of which at a rough guess takes up much less than a quarter of the deck space of an F-35B and accommodates less than a quarter as much fuel. Other than rounds for the Goalkeeper and RAM, the only other ordnance it carries would seem to be lightweight torpedoes and small ASMs like Sea Skuas.
Again, folks, the F-35B is the size of an F-4.