This redirects wishlists to use custom sort order instead of most recently added.
I created this userscript using an AI. It seems to work flawlessly. If you are on amazon.com, amazon.uk, etc. and you go to your wishlist, this userscript will take your wishlist URL, which includes your Amazon domain and that particular wishlist's ID, and make changes to the URL to make it use the custom sort order instead of the most recently added order. Since it is a redirect, it will take approximately one second for the webpage to redirect to the new URL. The code in this userscript is self explanatory with comments to show exactly what each piece of code is doing.