They can seize assets that belong to the entity. They can’t seize assets that belong to other people just because it happens to be on their premises, in the same way that they can’t seize and sell the cars that happen to be in a bankrupt store’s parking lot.
There are a lot of reasons why you should never sell things through consignment - but one of those reasons is that the goods cease to be yours in several significant ways. If a company is able to sell a good they could sell that good to fulfill debts - if it is a route to liquidate goods to cover debts then it's in the scope of the liquidator (though I think in most cases a sane liquidator would return the goods whole to avoid creating more debt than already exists and destroying non-fungible goods). If we assume the consignment sale was advantageous for the seller it's unlikely there's a way for the liquidator to quickly sell the goods in bulk for a better margin than the consignment contract offered so any sale they executed would likely add more debt than it cured.
I saw an analysis from a lawyer who said that there are situations where a creditor can claim consignment items, but that it didn't apply here.
Because they didn't file for bankruptcy.