It would be nice if there was a way to look at the inventory and see if its in
the wanted list.
There is, middle bottom row
That’s for each item / on the item page.
If you want to see if parts in an inventory (a set) already are in your WLs,
you can use the Inventory tab (not the Inventory page).
On the pic:
— link on top leads to the Inventory page (“old” page, but useful because it
has notes),
— tab in the middle shows the inventory with hearts to add parts to your WL without
having to open each item’s page,
— and the heart is full/red inside if you already have the item in on of your
WLs.