Please add it so you can put sludgy mud bricks found in a sludgeon in a purifier. This also would would work on decayed mud tiles.

So any sludgy mud brick block found in a sludgeon can be put in a purifier and it would revert it back to undecayed mud bricks. Worm pillars and decayed mud tiles also would work with this, reverting them to the undecayed versions.

Yes, this is doable with custom recipes as described on the wiki.

You could add this in yourself via custom recipes.
https://the-betweenlands.fandom.com/wiki/Configuration