If you aren't able to see the latest update in the App Store, here are a few things you could try to solve the issue:
‣ Go into the app details page where the update option should be available
‣ Log out and back in, in the App Store
If you click through the link in-game, make sure to click through to the details page to see the update button.
If you still can't see the update after trying this, please contact us at email@example.com.