Cordelia was quite a distance away from Prudencia but to solve the current problem and prevent the people from going hungry, they could make Alwin transport a good amount of goods to Prudencia even if just once, as a temporary solution while they order goods from the territories closer to Prudencia.
The transport of goods takes time, effort, and lots of money. She understood that much since Lobelius often exported a lot of their produce.
But with Alwin, all it takes was a few seconds. It would probably use a lot of his mana but she did say she would bully Alwin. Maybe, it was time she got a bit more serious about it.
Moreover, Alwin's the best magician there is. He surely had a lot of mana. He even teleported knights and investigators in one go. And there were a lot of them. She saw it from Raymond's thoughts since he saw Ferdinand off.
