Yasuo/Braum Wall and Ekko's W interaction

So, since the visual of the spell is a bolt of some sort thrown at the targeted area I was wondering if it was considered a blockable projectile and I've gone to lol wiki to find out about it with this result:

"This ability is considered to be a projectile for Unbreakable.png Unbreakable and Wind Wall.png Wind Wall."

So I jumped in tot est it as Yasuo. The thing is that I could never wall it no matter what I tried. I tried to use the wall reactively when Ekko just casted it (because I saw his standing time-clone which appears the moment you cast it), tried to wait for being actually able to see the AoE and place the wall before it activated. Everything with the skill not stopping.

Now I'm asking about your experiences about it with Yasuo and Braum and if you managed to block it. And I am also asking, is it then intended to be blocked or not?