Button recipes for classic wood types are not in the vanilla behavior pack

The bug

There are no recipe JSON files for oak, spruce, birch, jungle, acacia, or dark oak buttons. These recipes seem to be hardcoded, and cannot be replaced or modified by behavior packs. All other button recipes do have recipe files.

How to reproduce

1. /recipe give @p minecraft:pale_oak_button

2. /recipe give @p minecraft:spruce_button

Expected result

Both commands should work

Observed result

The second command fails with “The recipe could not be found.”