Right now, today, in part 25 there is no requirement to produce anything other than dry landing data. (My emphasis):
25.125(c) For landplanes and amphibians, the landing distance on land must be determined on a level, smooth, dry, hard-surfaced runway.
You won't find any reference to wet runway in connection with landing, though it occurs repeatedly in connection to takeoff data nd accelerate-stop data in particular.
The OLD which is operationally used (soon to be mandated) (after TALPA, after Midway) has no regulatory basis in part 25.