I manually flashed it somebody captured the OTA , check the fold 4 forum over on xda can find files there. I wouldn't get to excited not much difference found few bugs so I've flashed back to stock 12 ,
There is a considerable amount of difference with this new update. A bonus is that I'm now now the latest security patch whereas before I was stuck on July and then last week got an update for the September patch. Also the options to theme has improved for the 3rd party app icons no issues at all on this beta. More clock options and Samsung have copied Apple's lockscreen customisation. The fonts and the notifications all look different. Animations are smoother so overall I'm impressed 👍