Show count from nested relationship

[samuelsurbakti]

Hi.
I want to show count data from nested relationship. for some information there is my models:

class Province extends Model
{
    use HasUuids, SoftDeletes;

    protected $table = 'ref_provinces';
    protected $fillable = ['name'];
    
    public function regencies()
    {
        return $this->hasMany(Regency::class, 'province_id');
    }
}

class Regency extends Model
{
    use HasUuids, SoftDeletes;

    protected $table = 'ref_regencies';
    protected $fillable = ['province_id', 'type', 'name'];

    public function districts()
    {
        return $this->hasMany(District::class, 'regency_id');
    }

    public function province()
    {
        return $this->belongsTo(Province::class, 'province_id');
    }
}

class District extends Model
{
    use HasUuids, SoftDeletes;

    protected $table = 'ref_districts';
    protected $fillable = ['regency_id', 'name'];

    public function villages()
    {
        return $this->hasMany(Village::class, 'district_id');
    }

    public function regency()
    {
        return $this->belongsTo(Regency::class, 'regency_id');
    }
}

class Village extends Model
{
    use HasUuids, SoftDeletes;

    protected $table = 'ref_villages';
    protected $fillable = ['district_id', 'name'];

    public function district()
    {
        return $this->belongsTo(District::class, 'district_id');
    }
}

And this code I use to show datatable:

public function builder(): Builder
    {
        return Province::query()
            ->with(['regencies', 'regencies.districts', 'regencies.districts.villages'])
            ->orderBy('name', 'asc');
    }

public function columns(): array
    {
        return [
            Column::make("Nama", "name"),
            CountColumn::make("Banyak Kabupaten/Kota")
            ->setDataSource('regencies'),
            CountColumn::make("Banyak Kecamatan")
            ->setDataSource('regencies.districts'),
            CountColumn::make("Banyak Kelurahan/Desa")
            ->setDataSource('regencies.districts.villages'),
            Column::make('Aksi')
                ->setColumnLabelStatusDisabled()
                ->excludeFromColumnSelect()
                ->label(fn ($row, Column $column) => TableHelper::action_buttons(recordId: $row->identifier,
                        permissions: [
                            'edit' => 'AccelRef - Provinsi - Mengubah Data',
                            'delete' => 'AccelRef - Provinsi - Menghapus Data',
                        ],
                        cssClasses: [
                            'edit_btn' => 'btn_province_edit',
                            'delete_btn' => 'btn_province_delete',
                        ],
                        editModalTarget: '#modal_province_resource'))
                ->html(),
        ];
    }

but I got error Call to undefined method App\Models\Ref\Province::regencies.districts()

Laravel Version: 12

Package Version: 3.7