If you are blackholing the Edge NTP URLs, you get to see the local NTP, which only has a search box that defaults to your default search provider, and a giant Edge logo (thanks for the reminder, I didn’t know I was using Microsoft Edge here). This policy is available only on Windows instances that are joined to a Microsoft Active Directory domain, Windows 10 Pro or Enterprise instances that enrolled for device management, or macOS instances that are that are managed via MDM or joined to a domain via MCX. If I look under edge://policy it seems like the policy I set in the registry for the new page is blocked: