Help deploying Edge Chromium

I've been working on deploying Edge Chromium at a few sites. While I can easily get the MSI to install I'm running into issues controlling the first run/new user login experience.

I tried with a master_preferences file and looked through the GPO's available but I cannot find how to do the following:

1. Disable the first run/onboarding experience/welcome to the new edge

2. Disable the creation of a desktop shortcut during the install

3. Disable the creation of a desktop shortcut with new user logins to the PC

4. Prevent the pinning of the edge icon to the taskbar for new user logins

Here's the master_preferences file I've tested out, doesn't seem to have any effect. Placed in Program Files next to the msedge exe:

{
  "distribution": {
    "import_bookmarks": false,
    "import_history": false,
    "import_home_page": false,
    "import_search_engine": false,
    "do_not_create_desktop_shortcut": true,
    "do_not_create_quick_launch_shortcut": true,
    "do_not_create_taskbar_shortcut": true,
    "system_level": true,
    "verbose_logging": true
  }
}