SideQuest has claimed that it succeeded in installing 5 apps already in my Quest 3 (QuestZDoom, its launcher, QuakeQuest, Quake2Quest, and RazeXR), but none of those are showing up in the app library despite that it is set to show apps from unknown sources, hidden apps, and apps that are not installed. It lists only some kind of tutorial and SteamVR. QuestZDoom finally got a folder created for it in my Quest 3 according to SideQuest when I told SideQuest to run QuestZDoom (which really should be run using a separate launcher app that doesn't show up though it was supposedly installed too), but still nothing shows up in the headset. The "LAUNCH APP" button also has done nothing besides create that folder and show a Meta app popup prompt in my headset about a hundred times one right after the other, asking me something like if I am sure that I want a connection between my headset and my PC. I am able to get windows from my PC (e.g. Windows Explorer and Task Manager) to show in my headset, and I can interact with my PC through the headset, so it does have a connection, but my Quest 3 acts like it knows nothing of any sideloaded apps. I have also already restarted both my PC and the headset countless times.

EDIT: Somehow, something got two of the apps to show up when the headset is not connected to my PC. These are QuestZDoom, which cannot run because it has to be launched indirectly using the launcher app that still doesn't show up, and the other is QuakeQuest. Both show up in the taskbar represented by the icon for Quake, and I have to use the tooltips to tell which app is which. Somehow the folder for QuestZDoom also created, and I can find it using Windows, so I was able to put in the full game's files for Doom (doom.wad and doom2.wad) in there though that app still won't run because the launcher is missing, and the folder for QuakeQuest has not yet been created, meaning that I cannot give that app its files for the full version of that game. However, QuakeQuest does run (using just the game files for the first episode as with the original shareware version of the game), and the headset is hiding where it is that it has all the data for that game stored.