Just assume all of them
Although in all seriousness, most rides seemed open with the exception of everything on the top of the mountain (Ninja, Superman, Magic Mover). Which, in the last few years, they do tend to close off before and after haunt to (I presume) set up and tear down haunt stuff. Ninja and Superman were mostly open for haunt. Jet Stream is still down.
But a lot of things were running one train: Tatsu, Goliath, Viper, and Revolution (which has been on single train ops forever). Still, they were open, but the lines were pretty long and slow. Crazanity is open, as well as JL.
Also, I noticed if you're a member and trying to redeem Front of Line passes though the app, it doesn't seem to work anymore. Guess it's just a glitch? Not sure.
One perk: the haunt emporium store (near Apocalypse) will still be open for the rest of the calendar year, so you can still pick up haunt merch! And we saw many of the shirt for Saw being sold in Studio 6 (near Goldrusher).
Going back to the newly demolished ticket booths, it's amazing how much more open it feels without them. To me, it made the outdated lattice structure feel more modern. It'll be interesting to see if they keep it, or create an entirely new entrance. I feel like there were rumors a couple of years ago (I believe around the park's 50th anniversary that ended up happening during Covid) of the park getting an upgraded entrance. Let's hope it's actually happening... even if it's just this, it's already a big improvement.