Eager loaded relationship based on table filter

protected function getTableQuery(): Builder
{
    $filter_language = $this->getCachedTableFilter('language_id') ?? null;
    
    return Product::when(
        $filter_language,
        fn (Builder $query, $language_id): Builder => $query->withWhereHas('language', fn ($query) => $query->where('id', $language_id)),
    )
    ->when(
        ! $filter_language,
        fn (Builder $query): Builder => $query->with('language', fn ($query) => $query->where('default', 1)),
    );
}

$table->columsn([])
     ->filters([
    Tables\Filters\SelectFilter::make('language_id')
        ->options(fn () => Language::options())
        ->query(function (Builder $query, $state): Builder {
            // Or simplified down to this doesn't get eager loaded
            // return $query->with('language');

            $language_id = $state['value'] ?? null;

            return $query
                ->when(
                    $language_id,
                    fn (Builder $query, $language_id): Builder => $query->withWhereHas('language', fn ($query) => $query->where('id', $language_id)),
                )
                ->when(
                    ! $language_id,
                    fn (Builder $query): Builder => $query->with('language', fn ($query) => $query->orderByRaw('FIELD(`default`, 0), `name` ASC')),
                );
        })