Solved
The Sims 4 packs transfer to child's account
How can I transfer Sims 4 expansion, game and stuff packs from my account to my child's account? Or can I?
If the other account does not own the DLC, the save files wouldn't transfer properly.
If you haven't reached out to live support via Twitter or Facebook yet, I'd recommend getting in touch with the team there as they can explore a few more options with you on transferring content between accounts.
