Some users are reporting that they are unable to see the macOS 12.1 update on their M1 Macs.

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On Monday, Apple released an update for macOS Monterey 12.1, which brought SharePlay, Hide My Email, Apple Music Voice, along with the usual bug fixes.
However, as 9to5Mac has pointed out, not everyone is seeing the update. Some users, especially those with M1 Macs, are not prompted to download the update when viewing System Preferences.
The issue was also reported on Reddit's r/MacOS board, with users saying it appears to be affecting some M1 Mac users, but not others.
See also: macOS Monterey 12.1: Fourth beta version released for developers
Additionally, Microsoft Senior Cloud Developer Advocate Christina Warren reports that downloading the installer from the Mac App Store stops halfway through.

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Reddit posters suggest that particularly impatient users suffering from the issue can boot into Recovery and reinstall macOS. The recovery tool will download the latest version of macOS. AppleInsider recommends that users make sure they have a current backup if they use the recovery tool method.
Information source: appleinsider.com
