Okay, Ornn's Lava Elemental should definitely qualify as a champion summoned unit
Yasuo should not be able to destroy it any more than he can destroy Daisy, Tibbers, Sand Soldiers or the Dragonforce. Daisy and Azir's soldiers both have dashes - so you can't even argue that it's the first unit that looks like it might be a projectile. It's a unit!
Yasuo's wall doesn't destroy any other champion-summoned units - at most it causes them to fall short (e.g. Azir and Orianna), and where that doesn't make sense it does nothing at all.
It even feels like a bug, even though it's evidently working as intended since you spotlighted Braum doing it.
