Edge group policies for New Tab

I also could not find any policies, but hoped somebody know of a hidden feature or trick.

I have not found out where Sync preferences are saved, though it may be connected with the sqlite3 database file "%USERPROFILE%\AppData\Local\Microsoft\Edge\User Data\Default\Sync Data\SyncData.sqlite3".

The layout settings are stored in the Preferences file in "%USERPROFILE%\AppData\Local\Microsoft\Edge\User Data\Default\Preferences", more specifically in the "ntp" section (below sets it to Office 365 Informational - I tested it works changing it manually with Edge closed, so *ought* be able to edit it in a loginscript):

"ntp":{"feed_type":1
"layout_mode":2
"news_feed_display":"always"
"num_personal_suggestions":7
"show_greeting":true
"show_image_of_day":true
"show_settings":false
"show_top_sites":true}

But I have had no luck with Sync - and it being the most important to us, still hope somebody knows a way - or that MS will add a policy for it.