The scopes, and I think all Sights slot items, no longer display their quality in the new inventory UI. This was an issue for all mods in the stash before, but we could always look at them in our inventory to see the actual value.
Also, scopes do, clearly, still have rarities. The appearance of the items change, and the number of crafting mats they break down into can be used to estimate an item’s rarity. But there’s no easy way to identify them at a glance.