I think it was a glitch, but I just got an error message installing macOS about it being out of date, and prompting to install in reduced security mode. This suggests that you can, in fact, do new macOS installs on Apple Silicon without phoning home (or if it fails).
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Replying to @marcan42
Did you happen to capture a screenshot of that error message?
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Replying to @ClassicII_MrMac
I did not, but it was something along the lines of "This version of macOS is not up to date, do you want to continue in reduced security mode?"
11:38 PM - 12 Jan 2021
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