Submitting iPadOS 15 Updates Before Public Release

Hello,

Right when iPadOS 15 is released in the Fall, I'll want to support the new large widget and a few of the other iPadOS 15 specific features.

I'm working on them now in the Xcode 13 Beta, but to give these features out to users on launch day, can I update my app now with these features from the Xcode 13 Beta? Or would I need to wait until Xcode 13 is public?

Sorry if this question seems simple. This is my first time launching on the new update's release day, so I am unsure if I can submit those new features now or wait until launch day.

Please let me know!

P.S. My app is multi-platform (iOS, iPadOS, and macOS). Would submitting early from an Xcode beta potentially mess up the other platforms?