These scenes were always in the game yes.
To get Astarion's star gazing scene, you have to learn about the creche from Zorru.
For Lae'zel's star gazing scene, you have to do the same thing, but it's a bit buggy. If Astarion isn't recruited, you get slightly softer dialogue in the beginning and end of the scene. Otherwise you can talk to Lae after Astarion and you get much of the same dialogue. She doesn't have an exclamation mark over her head telling you that she has new dialogue. Sometimes you can get her scene the night after Astarion's but I prefer not recruiting him this early.
Camp often - like SUPER often. Like after every story beat and you'll get a million camp cutscenes often back to back.
I feel like if you don't see these scenes, you have no idea how much character these characters actually have.
