In this situation what is the benefit of importing the reference image as a plane instead of as a reference object? Maybe it’s something that will come up in a future lesson, but it seems like it would be better to import it as a reference object for being able to display it on top of everything so that you can see it through the mesh you’re working on.
Importing the reference as a plane makes it so the cylinder covers the reference image, and the reference image can only be seen in material preview or rendered mode. Importing the reference as a reference object, you can set it to be seen through the cylinder mesh and it is visible in solid mode.