I asked the same question for Hello Dolly last year and they didn't sell SRO until a week before opening since SRO area tends to be where the creative team watches the show while in previews and take notes.
I went up and asked yesterday, they said they wouldn’t be selling SRO at least until after previews. They said during previews they are selling partial view seats for $79 which are throughout the theater.
I also went to ask about standing room and the woman said they will offer it, but will be day of (obviously) and she didn’t know what the price will be since they haven’t started selling them yet. She did confirm that they will never do rush though which i thought was weird, I have a feeling that will maybe change in the future.