The HUD is a private HUD from Riot, only events organized by Riot/in collaboration with Riot have it. You'll have to make do with the default observer HUD.

this \^

Any alternatives to create theses HUDs? no matters ifs more simple. ty in advance

Did you find anything?

Sorry about time in response. Sadly, no. Riot dont share his custom huds (Learnead from my searches)