Walmart in Fallston,md use to be open all the time, why is the store closing at 12am now?

(COVID-19) Essential stores like Walmart tailored back hours of operation initially to help slow the spread of the virus. At this point however I would imagine that Walmart along with many other retail stores are having a hard time finding enough employees to open the store 24hrs.

Empty or too little shopping to support electric, security, food...

Lack of business at night

Probably no business, if you go to one's down south there 24 hour store's are just as busy at night as the day. Crazy