Hey @Margaret_Broekema - thanks for reaching out.
One thing to note is that the section loops through the selected collection_list and reuses the same static _collection-card block for each collection, so adding one URL setting to that block wouldn’t give you a separate picker per collection unfortunately.
The smallest customization I’d suggest is using a collection metafield. For example, create a collection metafield like custom.target_product with the type Product reference, then update snippets/collection-card.liquid so the card URL defaults to collection.url, but switches to collection.metafields.custom.target_product.value.url when that metafield is populated.
Then the full-card overlay link can use that resolved URL instead of always using collection.url. That should keep the existing carousel/scrolling behavior intact, since the resource-list carousel markup does not need to change.
If you specifically need this managed from the theme editor rather than collection metafields, that would be a larger refactor: you’d likely replace the section-level collection_list setting with manual blocks where each block has both a collection setting and a product or url setting.
Hope this helps!