Do you have any of the other filters set at all?
I've just done a search for Fashion & Clothing with all the filters set to default, apart from selecting dropship supplier only and have got the following results
Children's Clothing (34)
Designer & Branded Clothing (16)
Infants & Toddlers (12)
Men's Clothing (53)
Other Clothing Accessories (75)
Women's Clothing (72)
I'll pass it through to support to double check for you as well, but that's what I get with my search.