Sorry about the delay, I saw the reply but didn't have time to reply myself initially and then it got buried under other posts!
If your player character is the one that is supposed to be colliding with the Area2D, are you sure it is part of the Bruh
group? It could be that the player isn't in the right group and that's why the condition is failing and the code not working.
What you might want to do is add this code before line 7:
print ("body in bruh group: ", body.is_in_group("Bruh"))
print ("level not null: ", Next_World_3 != "")
Then you can check the console and see which of the two conditions is false
, which should tell you where the issue is.