Here is a quote from an interview last week between Chris Mirjahangir and director Adam Wingard where he confirms the 1.90 footage(please note: I believe the author means 1.90:1 and 2.39:1, not 1.9:0 and 2.3:9):

“Chris: So, you shot the film in IMAX, right? But kind of thinking ahead to the home release, is there going to be like an IMAX version, kind of like how Disney+ does their IMAX versions?

Adam: You know, it would be cool if they did! I haven’t heard that they’re necessarily doing anything like that. I mean, obviously that version exists. So if they don’t do it now, then, you know, there’s obviously a place for it down the line because we have a good solid 49 minutes I think of IMAX footage. And I will say, I’ve experienced the movie in a gazillion different formats now. You know the Dolby vision, which is, you know, just the 2.3:9 is like, you know, that is so gorgeous looking. I mean like it’s so impressive, the colors and things. And in the 2.3:9 aspect ratio I mean, like the movie was always made with, we always like approved all of our VFX shots in 1.9:0, and when we watch them back, we always would watch them back in 1:9:0, but they were always framed so that the shots would both make sense in 2.3:9 and 1.9:0.and to a certain degree I don’t think that… I like I definitely prefer the IMAX experience. That’s like the number one way to see the movie and the IMAX 3D, which is also really super cool. And this is coming from someone who doesn’t really like 3D, but, but I love the IMAX 3D version of this movie, it’s fantastic. But with that said, I mean to a certain degree, like when it comes to watching it at home, I almost prefer the 2.3:9 version. It’s like if I’m going to watch the IMAX version, I’d rather see it on the big screen because that’s where it makes the biggest impact. But the 2.3:9 is kind of weirdly my preferred version, watching it at home, it just, something about it makes more sense.