do you need multiplewishlist extension for Magento 2
You're able to add more than 1 wishlist in Megento 2. It's already on there.
Wishlist Plus for Magento 2
Is this the extension that you are mentioning? This wishlist extension allows customers to save to different groups in their wishlist and manage these groups.
Dear user,if you are looking for a Multiple Wishlists Extension for Magento 2, consider the Magento 2 Multiple Wishlists extension by ITORIS INC.