plastic on a heated metal blade is a bad idea.
The knife's handgrip you mean? Might well be painted wood... for exactly the reason you mention.
Yeah that does look like wood.
https://www.amazon.com/Humbee-Stainless-Steel-Professional-Chefs/dp/B089HXDN1G
https://www.amazon.com/Humbee-Stainless-Steel-Professional-Chefs/dp/B089HXDN1G