Tab modifyquery not working in custom page table

public function getTabs(): array
    {
        return [
            'siswa' => Tab::make("Siswa")
                ->modifyQueryUsing(fn (Builder $query) => $query->whereHas('siswa', fn ($q) => $q->where('kelas', '!=', 'alumni'))),
            'alumni' => Tab::make('Alumni')
                ->modifyQueryUsing(fn (Builder $query) => $query->whereHas('siswa', fn ($q) => $q->where('kelas', '=', 'alumni'))),
        ];
    }

    public function getDefaultActiveTab(): string | int | null
    {
        // not working
        return 'Siswa';
    }
    public function table(Table $table): Table
    {
        return $table
            ->defaultSort('created_at', 'desc')
            ->query(function (Component $livewire) {
                if (isset($livewire->tableFilters['created_at']['type'])) {
                    $modelString = $livewire->tableFilters['created_at']['type'];
                    $model_class = new $modelString;
                    return $model_class::query()->where('status', 'UNPAID');
                }
                return Spp::query()->where('status', 'UNPAID');
            })