When breaking aether grass, it never dropped an item. I tried using my fist, a diamond shovel, a netherite shovel, a gravitite shovel. Nothing seemed to work. The same is true for aether stone, aether dirt, blueberry bushes, quicksoil, skyroot log, various other blocks. Although cold aether cloud does drop its item.

Ah I see the pinned TODO loot table list. Will close.