How to access a BlueprintImplementableEvent in Level Blueprint?

#Custom Level Blueprint

Make a custom level blueprint so you can teach your level BP and your items to communicate in the C++ directly

or also then you can write BlueprintImplementable events in the Level BP that the items call in the C++ and you implement in the Level BP!

#Solus Wiki Tutorial on Custom Level BP

#Get Level BP

AYourLevelScriptActor* MyLvlBP = Cast<AYourLevelScriptActor>(GetWorld()->GetLevelScriptActor());
 
if(!MyLvlBP) return;
MyLvlBP->Yay!();

Enjoy!

Rama

PS: remember to reparent your existing level BPs, and do the config thing so all levels use your custom Level BP