hello! i tested a watercolor drawing on ipad pro (2017 - 10.5) and the Procréate application, with a pack of watercolor brushes made by Adilson Farias, and it works well! i didn't go too deep into the drawing, i just did a quick test, but it was already conclusive, (i copied a drawing by Adilson Farias, his drawing is much better done than my version)
here is his version :
So here is my quick version: