Apply a weakness effect to a zombified piglin, then use a golden carrot to begin a curing process. During the process, the zombified piglin will have a speed effect applied to it, in contrast with the strength affect applied to zombie villagers. After 3,600 ticks (3 minutes), the zombified piglin will convert into a regular piglin.
A piglin cured in the overworld will begin converting back into a zombie immediately.