Proposal Summary
This proposal covers the requirement to select the default sorting method as subcategory in the Wishlist page.
Requirement
In the Wishlist page the current default sorting method is “sort by name”. The requirement is to update the default sorting method to “sort by category”.
Current working of the default sorting method:

Our solution
We can change the default option of sorting method to “sort by category” by updating the extension named “WishlistUpdate”. We can set “selected” property of sub category sorting method as true to return the list of items in Wishlist page based on the brand.