I have to add the Tags for minecraft PLANKS tag and WOODEN_SLABS otherwise they won't be added.
I'm not sure about WOODEN_FENCES and WOODEN_STAIRS. But not tags are provided for these either if I dont add the tags myself.

Clarification: PLANKS was never meant to be set automatically by LibX.

Also it is worth noticing that LibX adds these blocks to tags named libx:impl_wooden_fences or libx:impl_wooden_stairs. Then the whole tag is added to the matching vanilla tag by LibX. This is due to the nature of the CommonTagsProvider as it needs to copy the tags when the sub-blocks from DecoratedBlocks are added but copying a tag twice or adding stuff without a BlockItem in the same provider to the same tag would fail.

It was fixed now, that the method that determines whether a block is a wood block did not consider the block material.