I have tried to do this in the constructor but it did not work:
UCrowdFollowingComponent* CFComponent = Cast< UCrowdFollowingComponent >(PathFollowingComponent);
CFComponent->SetCrowdCollisionQueryRange(1000);
CFComponent->SetCrowdSeparationWeight(10);
CFComponent->SetCrowdAvoidanceQuality(ECrowdAvoidanceQuality::High);