Minecraft v1.16.5
Forge v36.1.32
Horticulture v1.0.1

Fruit Tree Leaves are missing the block & item tag minecraft:leaves for mod recipe compatibility and for the mod FallingTree to be able to chop down the tree without having to add the fruit leaves to the config manually, since it checks for the block tag first.

Saplings are also missing the block tag minecraft:saplings, and the apple sapling is missing it for both the block and item tag.

Didn't even cross my mind since I don't think they're used in recipes normally? Will add the tags though.

Yeah, not in vanilla, but datapacks and mods can use the item tags for recipes. And the FallingTree mod use the block tag for leaves. Thanks!