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PHP 7.3 reaches end of support in December 2021 and Adobe Commerce 2.3.x reaches end of support in April 2022. You may want to consider planning your upgrade now to Adobe Commerce 2.4.x and PHP 7.4.x to help maintain PCI compliance.
The Magento_Wishlist implements the Wishlist functionality.
This allows customers to create a list of products that they can add to their shopping cart to be purchased at a later date, or share with friends.