If you look at the last few "confirmed" plots, all the lines are in the bottom left corner but the x-axis still goes to above 70 (I guess for the sake of consis

If you look at the last few "confirmed" plots, all the lines are in the bottom left corner but the x-axis still goes to above 70 (I guess for the sake of consistency) - this means that most of the space on the screen isn't used and it makes it very difficult to make out anything from the lines. And when you need to recreate the same plot with diffirent subsets of the data like you've done here, that's a great use case for an interactive dashboard which allows the user to select the countries/regions and also zoom in and out.