So, I booted up Minecraft beta 1.16, and Tried a survival world, about after an hour or two of playing, I found an enchanted golden apple in a desert temple. I ate it because I was low on hearts and had no food in my inventory, and it didnt give me extra hearts, it re-healed my hunger bars, but didnt give me any of the extra golden hearts it will usually give, I tried it with normal golden apples, they work fine, but enchanted golden apples don't give the extra golden hearts.

TL;DR: Enchanted golden apples dont give the extra golden hearts in 1.16 beta.