True once the local participant entered the route.
This boolean flag (bool) belongs to FInteractionUICanonicalRouteProjection under InteractionUI.
Runtime and UI code should treat this as resolved state from the owning object. Read it to present, branch, or debug behavior without re-authoring the underlying interaction data.
UPROPERTY(BlueprintReadOnly, Category = "InteractionUI")
bool bParticipantEntered = false;