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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_MultipleWishlist module implements the multiple wishlists functionality.
These are lists of products from a store a customer would like to buy. Customers can save products to multiple wish lists and copy or move items from list to list.