Free Procreate storyboard template on DIN A4 horizontal (landscape) page for story artists, animators, film directors, illustrators, and designers. This template has nine frames per sheet, in 16:9 aspect ratio (1.77:1). There are layers for text and a rule of thirds layer to help you reframe your shots.
You can get the PDF version of this template here: (soon).
There is also a desktop publishing version of this template for InDesign, with much more variations and choices available here: https://gum.co/16x9-ID-Av-Nxt-hrztl.