This is the 5419th most frequent Japanese word.
ipados
"iPados" is not a Japanese word; it refers to Apple's iPad operating system.
This usage of 'iPadOS' contextualizes it within a question about its version status on a device.
あなたのiPadOSは最新のバージョンですか？
Is your iPadOS the latest version?
Here, 'iPadOS' is used as a proper noun to refer to the operating system of an iPad.
私は新しいiPadOSをインストールしました。
I installed the new iPadOS.
In this sentence, 'iPadOS' is again a proper noun, contextually referring to the software being explored.