Computer Configuration > Administrative Templates > Microsoft Edge > Scareware Blocker settings
Both
HKLM\Software\Policies\Microsoft\Edge
This policy controls whether Microsoft Edge blocks sites that are detected as potential tech scams. This policy only takes effect if ScarewareBlockerProtectionEnabled is enabled. If you enable or don't configure this policy, Microsoft Edge blocks sites detected as potential tech scams. If you disable this policy, Microsoft Edge doesn't block sites detected as potential tech scams.