If the app (and the official SFMM IG account) are to be believed, Roaring Rapids opened back up today.
I was in the park all morning, and it was closed up until 1pm. But that said, I noticed a lot of brand new signage, and saw staff working up at the ride load. And all morning, the app said the ride was closed. Then, when I left the park, 30 minutes later, it said it was open and listed a wait time (1 minute... I suspect it had literally just opened, lol)... so while I didn't witness it personally, I believe it to be true.