Get Tier price by SKU or Product id in Magento 2 with TierPrice Storage Interface.
Magento\Catalog\Api\TierPriceStorageInterface is used to retrieve the tier price of a product. get(array $sku) method with an array of product SKU as an argument returns pricing information for the specified product.
You can retrieve the tier price of a single product or multiple products by their SKU as comma-separated. Just refer to the code snippet to get the tier price,