I've recently been trying my hand at Wix Code to create various functionalities to a store such as search functions, filter functions and adding to favorites/wishlist functions. I've been able to find some information on some of the forums such as this useful one here that allows you to either use a template to create a store with wishlists or code one on your own. Unfortunately, using the template has its own setbacks. That's mainly because there are a lot of things that you can't customize/modify, but I also found that I wasn't able to do these things:
1. Create a search function that allows you to find items in a collection with a quick global search
2. In the wishlist feature, it appears as though you can add items to a wishlist, but once you go back to the items page to browse items, there doesn't seem to be a way to show which items have been added to your wishlist. Like an indication that conveys that a certain item has already been added to your favorites.
I'd really really appreciate any help on this, I'm sure it'll be very beneficial, even to other online store owners in this community.