The helmet that Zonbified Piglin wears will break in sunlight.

How to reproduce

1. Summon a Zombified Piglin in the overworld with this command:

   /summon zombified_piglin ~ ~ ~ {NoAI:1,ArmorItems:[{},{},{},{Count:1,id:golden_helmet}]}
   

2. Wait about three minutes.
   → The helmet will break.