Is your daughter home alone all day doing remote learning, or has her school opened up now? If she’s home alone, what do you have in place to make sure she’s not getting into trouble? Parental controls or tracking on the computer to make sure she’s not being targeted by creeps? Nanny cam? I don’t want to sound paranoid - most likely this is just ordinary teen angst and separation from the same sex parent - but a change in behavior in a teen always warrants investigation (says the mother of a teen who developed anorexia/bulimia around this age).