https://www.bleepingcomputer.com/news/microsoft/microsoft-removes-lsa-protection-from-windows-settings-to-fix-bug/

Microsoft has fixed a known issue triggering Windows Security warnings that Local Security Authority (LSA) Protection is off by removing the feature's UI from settings.

LSA Protection helps defend Windows users against credential theft by preventing untrusted code from being injected into the LSASS.exe process to dump its memory or extract information.