✅ Why ins't this EF Core query being evaluated client-side?

C#
var board = Database.KanbanBoards
    .Where(k => k.OwnerUserId == AuthUser.OwningId && k.Id == boardId)
    .Select(k => new
    {
        Data =
            Database.KanbanColumns
                .Where(c => c.ParentBoardId == k.Id)
                .OrderBy(c => c.Order)
                .Select(c => new
                {
                    column = new
                    {
                        c.Id,
                        c.Color,
                        c.Label
                    },
                    cards = Database.KanbanCards
                        .Where(a => a.ParentColumnId == c.Id)
                        .OrderBy(a => a.Order)
                        .AsEnumerable() // <!--- run the rest on client side
                        .Select(a => new
                        {
                            a.Id,
                            Title = a.CardTitle,
                            Info = new
                            {
                                a.Value,
                                a.Temperature,
                                AssociatedUsers = a.AssociatedUsers
                                    .Select(n => AdapterCacheUnit.FetchUser(n)) // <!-- client side function
                                    .Where(n => n != null)
                                    .Select(n => new
                                    {
                                        n!.UniqueId,
                                        n.UserName
                                    })
                            }
                        })
                })
                .ToArray()
    })
    .FirstOrDefault();

C#
var board = Database.KanbanBoards
    .Where(k => k.OwnerUserId == AuthUser.OwningId && k.Id == boardId)
    .Select(k => new
    {
        Data =
            Database.KanbanColumns
                .Where(c => c.ParentBoardId == k.Id)
                .OrderBy(c => c.Order)
                .Select(c => new
                {
                    column = new
                    {
                        c.Id,
                        c.Color,
                        c.Label
                    },
                    cards = Database.KanbanCards
                        .Where(a => a.ParentColumnId == c.Id)
                        .OrderBy(a => a.Order)
                        .AsEnumerable() // <!--- run the rest on client side
                        .Select(a => new
                        {
                            a.Id,
                            Title = a.CardTitle,
                            Info = new
                            {
                                a.Value,
                                a.Temperature,
                                AssociatedUsers = a.AssociatedUsers
                                    .Select(n => AdapterCacheUnit.FetchUser(n)) // <!-- client side function
                                    .Where(n => n != null)
                                    .Select(n => new
                                    {
                                        n!.UniqueId,
                                        n.UserName
                                    })
                            }
                        })
                })
                .ToArray()
    })
    .FirstOrDefault();