@Sashas0nicThank you for your reply once again!
Ah, fair enough. I'm used to coming from games like Skyrim or Fallout, or even A Hat In Time where simple clothing or armor down to the big ones that change how the game is played are under one umbrella; just mods. I guess it's a community thing, and also because The Sims seems to go by the CC and mods distinction. We're on the same page though, so we're okay.
As for my findings; the Tray Importer isn't bringing up any CC on my Sim, though I'm not 100% sure I'm doing what I'm supposed to be doing. Let me know if there's anything amiss in the image I attached. I also didn't find any other files in my mod folder other than the mosaic mod. I think I'll just reinstall anyway for a clean slate, since it's been a long time and it's not too much of a hassle, which will double as a repair for the game. If I can't find the boots it's no biggie. I'm not too concerned with actually using them, it's just their existence confounds me. More of a curious thing than an actual issue. Thank you for the assistance, though!
Also, I remember submitting this post half an hour ago, but the site doesn't seem to think I did. Oh well. So long as I don't end up double posting.