I have connected my iPad and iPhone to my Macbook via a cable. The devices are showing up in finder. Both devices are enrolled to the Beta program. The Macbook as well. Macbook has already v18, on my iPad I want to install iPadOS 18 but the memory is not sufficient, so I want to do it via MacBook -> Finder.
So, I hit the [Check for Update] Button in Finder at the Software section when I have opened the iPad view, but it reports that the iPad OS is already latest (17.6). How can I install a Beta update via Finder for devices like iPad, iPhone?