February 2021
@Joha129 Buying a Sims 3 pack gives you the right to play it in the 32-bit or the 64-bit version of the game. However, sometimes the "entitlement," as it's called, for the 64-bit version doesn't get applied to an account after purchase. The solution is to contact EA customer support and ask for the entitlement (not a code, not a separate pack) to be added manually.
https://help.ea.com/en/contact-us/
February 2021
Thank you!! It worked!!!