Why does no one seem to be hiring?

I'm a grad student living in New York City whose stipend runs out in June. To avoid paying back the scholarship and moving back down south with my mom, I've been applying EVERYWHERE from retail jobs that have nothing to do with my studies in cybersecurity (Trader Joe's, Costco, etc) to government and FFRDC jobs such as with the CIA, MITRE, MIT Lincoln Labs, etc. Despite 50+ applications, I have still been unsuccessful in my job search. My studies are very technical, so it's possible that retail sees me as overqualified for those positions, but I'm still curious... why does no one seem to be hiring? I'm at a loss for what to do, and getting on unemployment, if payments are as little as they were several years ago, won't cover a $2,000 rent every month.

EDIT: for context, my scholarship requires me to work in federal positions, but state and FFRDC positions are tolerated. In the meantime, though, I'm looking for more public-facing jobs that are easier to get, e.g., Trader Joe's, so I don't have to move in the meantime since I love New York so much.