About com.apple.developer.networking.multicast, i got same questions.
I have an app that via Wi-Fi to get information(name, battery level, etc.) about wi-fi connected speakers.
I found on Google that in iOS14.5 and later, you need to apply for this permission(com.apple.developer.networking.multicast) to use multicast. In fact, speaker can be searched in iOS14.4 and earlier , but not iOS14.5 and later.
However, I have upgraded to iOS15.1 and the speaker can be scanned without applying for this permission. May I ask why?
Or why isn't it available for multicast between iOS14.5 and 14.9? I didn't write this Wi-Fi communication method, but I saw in the comments that it uses multicast for data retrieval.