Get the product count by attribute(swatches) in filter option in magento 2

 \Magento\Swatches\Block\LayeredNavigation\RenderLayered::getOptionViewData

return [

    ‘label’ => $swatchOption->getLabel(),

    ‘link’ => $linkToOption,

    ‘custom_style’ => $customStyle,

    ‘count’ => $filterItem->getCount()

];

Magento/Swatches/view/frontend/templates/product/layered/renderer.phtml

<?php foreach ($swatchData[‘options’] as $option => $label): ?>

    <?php if(isset($label[‘count’])) {echo $label[‘count’];} ?>