This same question, Why is After Effects missing from CC? has been asked about a dozen times on this forum in recent days. The same answer applies. If the Creative Cloud app doesn't show After Effects then your system is not compatible with the CC version of After Effects. It does not meet the minimum system requirements. You should have the option to download and install CS6. If CS6 does not show up then you have a 32 bit system that is not compatible with CS6. It's as simple as that.