Tier 8 Delve dropped for me " Torchbearer’s Shoulderguards" iLvl 639. If I wear them, AMR will immediately the current shoulders back, sure. But I wanted to add them with “Add to my bag” with higher iLvl, but nope, Item is not available (and yes, I selected Shoulder slot).
The item is there… but it looks like the Delve Tier filter on the item list is not working as expected. We’ll take a look and fix that in the next site update.
In the meantime, you can also use the Valorstone/Crests search to see how higher upgrade levels of an item that you own would rank, in this case taking that item up to 8/8 champion.