Zombified piglins are aggresive to you while in the creative mode (Single Player), you can see it in the video

(I can't post the video here because of the limit)

Link to the video: https://drive.google.com/file/d/1OUC0lfMgRzxAheG-SqVFefKSv3inDSC3/view

How to do it:
1. Die in the nether
2. Go to the nether
3. Find zombified piglins and be careful that no one around them like ghasts or piglins (Aggresive mobs)
4. Attack them in the survival mode and let them hit you
5. Switch to the creative mode and attack them
6. Done, they are now aggresive to you while in the creative mode