The broken wishlist mechanism of Xbox - Console and PC and Website

Hello Folk,

One of the things I like to do is add games to my wish list. That way, I can buy them later, or wait for the price to drop or a sale and then grab them.

The problem is, its almost impossible to add items to wish list in the entire Xbox Eco-system. Here are things I have noticed.

1. On my surface pro, the Microsoft store does not even have a wish list option on the top right corner. Both the PCs are updated to the latest windows version available. So, updates cannot be the problem.
   
2. On my main PC, there is a wish list option in the Microsoft store, but this morning, it stopped showing my wish list, asking me to sign in. Of course, I am already signed in because I can see my past orders, library and all that. That means, as of today,
   I can neither add items to the wishlist, nor can see them on the store app.
3. Now, I logged into xbox.com, and I can see the wish list just fine. Unfortunately, on xbox.com, there is no way to actually add items to wish list. I can see the buy button, but I see no heart symbol (which is for wish list I think) or add to wish list
   option anywhere.
4. Thanks to the recent updates on the iOS, I cannot even buy games on my iPhone or iPad. So, adding or managing wish list remains a distant dream.
   

Why is it so broken? No other gaming platform makes it so hard to maintain a simple games on wishlist. I have PS4, Origin, Steam and GOG. No one makes it this bad.

What is the story? what am I missing?

:)