Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
Lets you filter your autosuggestions by selecting a filter from the search filters ribbon. For example, if you select the "Favorites" filter, only favorites suggestions will be shown. If you enable or don't configure this policy, the autosuggestion dropdown defaults to displaying the ribbon of available filters. If you disable this policy, the autosuggestion dropdown won't display the ribbon of available filters.