All new releases are available, either via OTA (Over The Air) update from "Software Update" in "Settings" on iPhone and iPad, or via a full download from iTunes. To download it is necessary to be connected to a Wi-Fi network and it is advisable to have at least 50% of residual charge or better, to keep the device connected to the mains during the update. On iPhones and iPad Pro with 5G connectivity it is also possible to download updates via the cellular network after having previously activated the ability to do so via network settings.
The update to watchOS 8 for Apple Watch requires connection to the charger and an autonomy of at least 50%. To proceed with the update it is necessary to download it via the "Software Update" section in the General menu of the Watch application. The tvOS update will be done automatically as soon as it is made available on the servers, unless manual mode has been selected in the settings.
If you have been following beta testing, developer or public, you should delete the profile and update normally as the final version just released is a new build.