Apple.com has now been updated with new information on the new software releases.
You can go to Apple's Website by clicking here.
Click here for more details on iOS 15
Click here for more details on iPadOS 15
Click here for more details on macOS 12
Click here for more details on watchOS 8
You can also re-watch the event here: https://www.apple.com/apple-events/june-2021/