Monday at 1 p.m. ET is your update window, and there are a few things worth doing before you tap that update button, especially if you rely on any of the features that were pulled from this release. First, be sure you have a full backup before doing anything (either a manual or iCloud backup). Also, I always update my apps beforehand, since many app developers test their apps using developer betas. I expect issues with any release, so you may want to wait until the dust settles.
I have been running the iOS developer beta (as well as macOS, watchOS, and iPadOS) since they started being released. It’s always risky doing that, and there have been plenty of issues that came out during those update cycles. Things seem relatively okay with iOS currently (as well as iPadOS and watchOS). I still have found a few oddities with macOS, but I’m sure those will be eliminated with subsequent releases.
Enjoy iOS 27. It’s quite an interesting update!