Did you pre-order Standard Edition? If so, access to the TSW3 version of Spirit of Steam over Early Access is a Deluxe Edition benefit.
It may take a little while for some fo the Add-ons to download (but you can play the game in the interim period). If you turn the game on and off again when they've fully downloaded, they should be visible.
Hi ehz0689, please note that the final game files were not available weeks ago. Furthermore, Train Sim World 3 consists of the core game (Training Center) + each of the routes in your bundle, which download separately. If you can tell us which platform you are playing on, we can provide you with specific instructions on how to download the other routes.