If this is intentional then go ahead and close it but shouldn't the new wood types have boats? Or at least make a vanilla oak boat or something if I use planks to try and make a boat?

From what I understand these aren't really wood types perse. However, if there are boats for the vanilla mushroom things in the nether then yes this should be added.

Yeah the vanilla nylium types don't have boats so the Cinderscapes nylium also don't have boats.