Beat Saber packs for kids account - how to purchase?

I am trying to buy a music pack for my kids in Beat Saber.

BS says that you can’t request the whole pack until you have permission for each track. So we funneled requests for every song, but when I go to approve those it only lets me “approve and purchase” the individual tracks. Obviously that’s not the goal here.

I see that I can gift individual tracks, but I don’t see that option for a pack.

How do I get the system to let me just buy a full music pack for my kids?