Have you had any issues with your Smart Keyboard?
I stopped using mine because where it connected to the iPad, some metal was exposed (after say 6-9 months of use) and it actually scratched the side of my iPad.
I ended up ditching it for a Logitech keyboard/case which also conveniently protects the back of the device and includes a loop for the pencil.
But it's not as nice to draw on like that though.

My smart Keyboard Folio is starting to come apart at the seams, but otherwise, no issue with the sides on my iPad Pro.