What is she left me on delivered?

"She left me on delivered" is a phrase commonly used to describe the act of someone not responding to a message even though they have read it. The term is derived from the messaging features of popular social media platforms such as Snapchat, Instagram, and Facebook that notify users when their message is delivered and read. It can also be used when someone intentionally chooses not to respond to a message. The phrase is often used in a negative or comical context and is commonly associated with romantic relationships.