You may consider the following:
oxalic acid does do a good job restoring the color of the wood after the use of sodium or potassium hydroxide as well as removing metallic tannate discolorations, over the years it gained a reputation as being a “cure-all” for other types of wood discolorations as well.
I personally have not used it, but seen a few YouTube videos where it seems to work with the problem as the table in mention.