Boundary with daughter!

How can I know if what I am presenting is a boundary or a threat?

My daughter is a high school freshman. Since distance learning began she has not engaged in school at all. She says she isn’t motivated and doesn’t care. She is now failing all classes. She isn’t doing anything except laying in her room, watching Netflix, social media, FaceTime, etc. She is all set up to continue this right into the summer, and who knows what will happen with school in the fall.

If I say to her “you need to have a job this summer, or the internet and data will be turned off until you do,” is that a boundary or a threat?

I was listening to the “mother “ podcast and the talk about boundaries has me questioning myself. I want to set a boundary around what I’m willing to put up with in the house, not make a threat.