iPhone and iPad users can further safeguard their privacy by using a private MAC address feature in iOS and iPadOS. This should be particularly useful if you’re frequently connecting to different public wi-fi networks, and you don’t want the devices MAC address tracking to be used.
For some technical background, every time you connect to a Wi-Fi network regardless of the device you’re using, your device has to identify itself to the network using a MAC address. The MAC address is typically a hardware address associated with your device, and by default the same MAC address is used as you switch between different Wi-Fi networks, which could be a security or privacy risk since it identifies your device.