Unlit materials by definition do not interact with light, so they don’t cast shadows. However you can usually get what you want by using a lit material, setting BaseColor and Specular to 0, then just keep your EmissiveColor input.
Unlit materials by definition do not interact with light, so they don’t cast shadows. However you can usually get what you want by using a lit material, setting BaseColor and Specular to 0, then just keep your EmissiveColor input.