I realize the reasons I couldn’t notice the challenge packs before was due to two factors:
The first is that I usually generate season 02 female characters, and the effects, items, companions, etc. of the challenge packs seem to only be available to the season 02 male characters.
The second reason is that when you go to the season 02 male screen to choose a pack, it doesn’t initially show the challenge packages listed with the other packs. However, after clicking “Load All” or “Load Modern” to play, if you then go to the settings screen (such as for when you want to save, export, or load), the challenge packages icons will then appear along with the other male season 02 packs, even though they are not normally visible when you first go to the selection screen.