I must've misinterpreted
> AirPods Max require Apple devices running iOS 14.3 or later, iPadOS 14.3 or later, macOS Big Sur 11.1 or later, watchOS 7.2 or later, or tvOS 14.3 or later.
It also says: "AirPods Max can be used as Bluetooth headphones with Apple devices using earlier software and with non-Apple devices, but functionality is limited."
