Seems that Apple's Big Sur also puts Windows 10 to shame with regards to sending home your (or should we say their?) telemetry
data back to Apple's headquarters.
For those getting a bit fed up with this behavior, a separate router computer (can be an old clunker for small networks, as long as there are at least 2 NIC's in it) between your ISP's modem and your computer(s) becomes a bit of a necessity.
Such a router can help you divert crap traffic, and telemetry I regard as crap. Apple (or Microsoft for that matter) can play as fast and loose with their own backdoor tricks on the systems where their OS is installed, a physically separate router box will foil their plans indefinitely. Better stock up on a few Raspberry Pi 400
devices, get an extra USB NIC or design your own NIC for its expansion port and you'll be set for years to come.
Late '90s and early '00s, hanging out on the internet was actually fun in those days. On your own computer, without having to worry about anyone else hell bent on getting every bit of your internet experience for their own (nefarious?) gains.