It should be possible to block the IPs these Apple wares connect to. Currently the easiest solution I have found is ProtonVPN, which claims to block them - https://protonvpn.com/blog/big-sur-exclusion-list/ .
(Ofcourse, the best solution is to not upgrade macOS and stick with macOS Mojave).
I tried to block some of the ip-s Mac was connecting to and then apps had stopped working. Back then I thought I did something wrong and didn’t have time to test it further but in light of recent events It could be I have stumbled on the issue with getting permissions for each app that made a lot of ‘good publicity’ for apple...
(Ofcourse, the best solution is to not upgrade macOS and stick with macOS Mojave).