Computer Configuration > Administrative Templates > Google Chrome > Local Network Access settings
Both
HKLM\Software\Policies\Google\Chrome
When this policy is set to Enabled, Local Network Access requests will only display warnings in Chrome DevTools due to Local Network Access checks failing. When this policy is set to Disabled or unset, Local Network Access requests will use the default handling of these requests. See https://wicg.github.io/local-network-access/ for Local Network Access restrictions. This enterprise policy is temporary, and will be removed after M146. Long term, the policy LocalNetworkAccessAllowedForUrls can be used to allowlist URL patterns that should be automatically granted the Local Network Access permission. Note that if the policy LocalNetworkAccessRestrictionsEnabled is enabled, it will take precedence over this policy.