https://www.macrumors.com/2024/06/10/ios-18-rotate-wifi-address/
With iOS 18, iPadOS 18, and macOS Sequoia, Apple has replaced the Private Wi-Fi Address option for Wi-Fi networks with a new Rotate Wi-Fi Address...
It is, it works in two ways depending on the network type and Android version.
By default it creates a random MAC for each network that doesn’t change until a factory reset, even if you forget and connect again. This is on all devices.
Android 12 and up will change the MAC every so often on open networks without a captive portal, or if the network or an app specifies to do so. It it does this in between connections so won’t interrupt what you’re currently doing.
iOS functions like the first one currently, except I think deleting and adding will create a new one. It sounds like they are moving towards the second, but maybe with less logic?