Yes — goji berries are safe and nutrient-dense, usually offered dried (and unsweetened). A popular healthy bird treat.
Keeper's noteA small pinch of plain dried goji is a well-liked, nutritious treat and a good foraging-toy filler. Soak to plump them for small species. Unsweetened only.
Why goji berries is good for parrots
Goji berries (wolfberries) are non-toxic and rich in antioxidants, vitamin A, and trace minerals. They're almost always sold dried, so they carry concentrated natural sugar — fine in small amounts. Choose plain, unsweetened, unsulphured goji with no additives.