This is not new - every time I update macOS, some of the system settings are changed to default including some in the firewall. And I have to painstakingly go through all of it and change it. Also, the few times I've reinstalled or updated macOS, I've always noticed that it takes longer for the installation if your system has access to the internet - so now I've made it a practice to switch of the router while installing or updating macOS or ios. (With all the AI bullshit being integrated everywhere in Windows, macOS and Android etc., I expect this kind of "offloading" of personal data, and downloading of data, to / from AI servers to keep increasing, especially during updates, to "prepare" for the new AI features in the newer OS updates. No internet means the installer is forced to skip it for later, saving you some valuable time, and hopefully you get to change the default setting before it starts up again. Whatever the claims of AI processing done on the Mac or iDevices itself, some "offloading" to their servers, will still happen, especially if the default settings - which you can change only after the OS is installed - also enables analytics and data collection.)
(More here https://news.ycombinator.com/item?id=26418809 and on this thread - https://news.ycombinator.com/item?id=26303946 ).