How to get all attribute set list Magento 2?

You can see all the Attribute Set lists from the Admin Panel. Store -> Properties -> Attribute Set.

You can explore all the attribute-set lists programmatically by the Magento\Catalog\Api\AttributeSetRepositoryInterface.

Retrieve all the attribute lists of the system by first create an object of the Search Criteria builder, Pass the object to the getList() method of the above interface.

<?php
namespace Jesadiya\ListAttributeSet\Model;

use Exception;
use Magento\Eav\Api\Data\AttributeSetInterface;
use Magento\Framework\Api\SearchCriteriaBuilder;
use Magento\Catalog\Api\AttributeSetRepositoryInterface;

class AttributeSetList
{
    /**
     * @var AttributeSetRepositoryInterface
     */
    private $attributeSetRepository;

    /**
     * @var SearchCriteriaBuilder
     */
    private $searchCriteriaBuilder;

    public function __construct(
        AttributeSetRepositoryInterface $attributeSetRepository,
        SearchCriteriaBuilder $searchCriteriaBuilder
    ) {
        $this->attributeSetRepository = $attributeSetRepository;
        $this->searchCriteriaBuilder = $searchCriteriaBuilder;
    }

    /**
     * list attribute set
     *
     * @return AttributeSetInterface|null
     */
    public function listAttributeSet()
    {
        $attributeSetList = null;
        try {
            $searchCriteria = $this->searchCriteriaBuilder->create();
            $attributeSet = $this->attributeSetRepository->getList($searchCriteria);
        } catch (Exception $exception) {
            throw new Exception($exception->getMessage());
        }

        if ($attributeSet->getTotalCount()) {
            $attributeSetList = $attributeSet;            
        }

        return $attributeSetList;
    }
}

You can retrieve all the list of attributes set using the for each loop.

$attributeSetList = $this->listAttributeSet();
if ($attributeSetList) {
    foreach ($attributeSetList->getItems() as $list) {
        var_dump($list);
    }
}

Output:
List of all the attribute sets.