I woke up early and can't get back to sleep so my phone is in Digital Wellbeing mode (grayscale screen). Those chart lines are nearly impossible to distinguish from each other. Should have gone with a dash or other marking.
There are no legends, so taken out of context you'd have to just know what the colors mean. In grayscale they are virtually the same, so you couldn't tell anyway. Even if they draw the lines the same, they could've used different style endpoints. Again though, without a legend you wouldn't know which is which. Even if you're not in "wellness" mode you may be in say, "color blind" mode (sadly not really optional) and in that case these may be particularly difficult to read.
They don't have vertical axes either, so putting the charts side by side or overlaid doesn't make sense, because you can't know if they are the same scale unless you compare the endpoint numbers. (Hint: they aren't the same scale.)
These charts aren't necessarily misleading by design, but they lack the fidelity they probably should have in order to be truly useful, particularly taken out of context.