Piglins should keep their form on infected blocks

When the piglins are in the overworld they should not convert if some conditional. my vote would be if they are standing on the nyleium and or/ they're out of skylight? I just think a mechanic to keep their forms when they're in the overworks would be cool and it seems fitting that the Flora/habitat/curse/taint/infection from the nether is spread to the overworld could help keep them alive. It would just be cool to fulfil some goal and be able to keep them alive in the overworld