Hiram Alejandro Durán/THE CITY When the Astoria Mutual Aid Network began in March, volunteers focused on making sure homebound or down-on-their-luck neighbors had groceries. Getting food to people still represents the bulk of the group’s duties, said Maryam Mudrick, a former event planner who co-founded the organization with her partner. But requests for help have shifted. For example, the group has recently fielded queries from young mothers struggling to buy an essential: diapers. “We get the call a lot,” she said. “Diapers are f---ing expensive.” To cope with the demand, the group has used cash donations to buy diapers in bulk, and is working to open a permanent “diaper bank,” Mudrick said — a type of facility found in each borough except Queens and Staten Island.