A good shipwreck treasure chest with the new Fortuned Traveler Perk Smithing Template.
The rib armor trim was found within the first 5 chests of a fortress with some luck (and additionally a diamond in the same chest).
A treasure bastion chest opened with Luck VI, the maximum survival-obtainable luckiness. It features a netherite ingot, an enchanted golden apple, an ancient debris block and 6 gold blocks.
It took quite a few tries but 12 enchanted golden apples generated in a single ancient city chest opened with Luck VI.