So.....
I did not do everything you suggested.
1) I'm just not tech savvy enough and it's all very intimidating. I can troubleshoot pretty well, but the list was long and spiked my anxiety for some reason...
That being said...
2) I did remove that Sims 4 folder and restarted my computer.
3) I opened Origin, started Sims 4 and picked a random family in Tortosa (or whatever it's called) - I did NOT let any of the new content for the delivery download, but all the packs/kits/stuff/expansions were installed.
4) I had a zoom meeting, so I basically just let the game run on auto and left it alone for about 30 minutes -- nothing happened that shouldn't. The rich family in Tortosa just went on about their business while I zoomed.
5) I did not save that game. I shut it down. Turned it all off - went to dinner - computer was shut down...
6) Upon my return, I deleted the OLD Sims 4 folder with all my previously saved games that was on my desktop
7) I deleted the 'newest' Sims 4 folder - the one made from before my dinner
8) I cleaned out my recycle bin, restarted the computer (why? for a clean slate!)
9) I then left my computer on and idling while I showered. You know, to see if anything weird might happen - nope.
10) Started Sims 4 again with a clean slate - allowed deliveries to be made, sat through all the packs making themselves known, etc. Then made a brand new Sim, taking my dear sweet time. Even used 'my stories' to make a second sim to go with the first... About an hour+ later, I put them in a house in one of the original worlds.. (Willow? Something - the one with the tree you can travel through to get to the hidden glade)
11) Played for about an hour: Used the gallery to find a new house to dl. Had them move to an empty lot, put the house in, changed the house up a bit. Got my sims working on a few skills, including getting to know each other.
At this point, nothing was going on that shouldn't. No shutdowns/sleeping modes. Yay! I suspected it was only in Tortusa that the sleep mode happens. Maybe you're not supposed to use those residential lots....
12) So I saved and exited, went to Tortusa (same game mind you) and picked that rich family in the huge house. Thebes? (Same as when I zoomed)
13) Played the five sims for... I dunno 15-20 minutes. Just had them talking... my fans started to churn a bit, but the machine wasn't HOT or anything. I waited for sleep mode to hit because, in the past, soon as the fans started whirring, it took a minute for it to go to sleep. Nothing.
Result? I think I had a corrupted file. Everything seems to be working fine now. I'll test again tomorrow and see about playing my new sims and see what happens.