WPF ListView not Binding to ViewModel Property

Question

I'm trying to setup a listview that, after a call to the Azure GraphAPI will load a list of users. Everything up to the binding of the data works. The call to Graph works, the returned data works, all without issue.

I have a listview setup in a view:

 <ListView ItemsSource="{Binding NoPicUsers}"  >
            <ListView.View>
                <GridView>
                    <GridViewColumn
                        Header="Display Name"
                        Width="200">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding NoPicUsers.DisplayName}"></TextBlock>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>

The corresponding ViewModel has the following code:

 public class ContentPanelHomeViewModel : ViewModelBase
{
    private List<UserModel> _noPicUsers;//NotifyTask<List<UserModel>> _noPicUsers;
    public List<UserModel> NoPicUsers
    {
        get
        {
            return _noPicUsers;
        }
        set
        {
            _noPicUsers = value;
            
            //OnPropertyChanged Method is in ViewModelBase
            OnPropertyChanged("NoPicUsers");
            
        }
    }
    public ContentPanelHomeViewModel()
    {
        //NoPicUsers = new NotifyTask<List<UserModel>>.Create(GetNoPicUsersAsync());

        //NoPicUsers = NotifyTask.Create(GetNoPicUsersAsync);
        var users = GetNoPicUsersAsync();
        
    }

    private async Task<List<UserModel>>  GetNoPicUsersAsync()
    {
        GraphServiceClient graphClient = await GraphAPIServices.SignInAndInitGraph(AzureAppInfo.UserReadAll);
        List<UserModel> users = new List<UserModel>();
      
       var listOfUsers = await graphClient.Users
            .Request()
            .Filter("accountEnabled eq true")
            .Select("displayname, id")
            .GetAsync();

        foreach (var user in listOfUsers)
        {
            UserModel azureUser = new UserModel();
            azureUser.DisplayName = user.DisplayName;
            azureUser.ObjectID = user.Id;

            users.Add(azureUser);
        }

        NoPicUsers = users;

        return users;

    }

}

My listview does not display any data and I cannot figure out why. There are no reported errors and no binding errors reported when the WPF window loads so I'm not sure what would be the issue?

EDIT: I've updated my code. I'm implementing the NugetPackage Nito.Mvvm. I get the same problem of no data binding to my list view if I set my NoPicUsers inside of the GetNoPicUsersAsync() the WPF window yells saying NoPicUsers property no found on object of Type UserModel.

So it appears that it thinks my ViewModel as a UserModel property instead of a List property. What would cause that?

In stepping through the code the task never seems to complete. The Task sits at Status = WaitingForActivation, Method = "{Null}", Result = "{Not yet computed}".