Beat saber Xbox deal Meta quest 3s problem.

So I was opening my Meta quest 3s that I got for Christmas but when I activated the headset it said to pre load the games onto the headset. I went to my dad to let him know that if I can have his account on the headset so I can play beat saber. He told me that beat saber is supposed to be on there. He said that it was the Xbox game pass ultimate deal. But we looked at the order info. No code. The promotions tab on the headset. No code. The promotions tab on the app. No code. I tried to do everything to get it. But still no luck. We might try to figure out a way when I get home from my Grandma's house. But for now I need help.