Computer Configuration > Administrative Templates > Google Chrome
Both
HKLM\Software\Policies\Google\Chrome
A URL to an image that will be used as an enterprise badge for a managed browser. The URL must point to an image. It is recommended to use the favicon (example https://www.google.com/favicon.ico) or an icon no smaller than 48 x 48 px. Note that this policy is only applied for managed browsers, so it will have no effect for managed users on unmanaged browsers. On Microsoft® Windows®, this policy is only available on instances that are joined to a Microsoft® Active Directory® domain, joined to Microsoft® Azure® Active Directory® or enrolled in Chrome Enterprise Core. On macOS, this policy is only available on instances that are managed via MDM, joined to a domain via MCX or enrolled in Chrome Enterprise Core. Example value: https://example.com/image.png