Significant changes were made in both macOS Sequoia and Tahoe, including controls the user has over both Gatekeeper and XProtect. This article explains how those controls have changed, in particular what you can now do to disable Gatekeeper and XProtect checks. In Tahoe, on-demand XProtect check against its detection rules may be omitted if the first three of those verify correctly. There are also two other flavours of XProtect: periodic scans by XProtect Remediator to detect and mitigate any malware, and a behavioural XProtect that gathers security intelligence for Apple. There doesn’t appear to be any direct way of disabling Gatekeeper or on-demand XProtect, nor does there appear to any way of disabling XProtect Remediator scans.