You need to trigger wasp event first to open the area under shed. Destroy 2-3 wasps nests /kill wasps until you get message saying wasps are angry, then you can sleep and event should trigger to open it up.
AKA Forgotten Burg.L Chip. Ill do a quick run inside new area showing you how to avoid the combat and grab this chip. It will have recipes for food using wasp parts and the very handy New Dissection Expert Mutation. Also grab the Wittle Widowling trinket for fun even thou i have a vid on it already. So ya shows you how to get dissection expert mutation.