How medieval art shaped modern comic heroes?

This piece traces western comics back further than most people expect, tying their visual storytelling roots to medieval art like the Bayeux Tapestry before eventually landing on stuff like Superman.

Here’s the Bayeux Tapestry angle that ties this whole thing together.

The Bayeux Tapestry angle makes sense to me for the “story in a line” part — the repeated figures, that marching rhythm, and the little text bits really do feel like early captions, just stitched instead of printed. When the article jumps from that to Superman, what specific visual thing are they claiming carries over (like the way the eye is guided without hard panel borders, or something more literal like hero poses)? not sure about this one.