Chametz on Shabbat hotplate

Over the last Shabbat, challah wrapped in foil was mistakenly placed on the hot Shabbat hotplate beside a kashered kfp metal pot. The hotplate was covered with 2 layers of foil.

Was there any transfer? Did the pot become non-kosher for pesach?

Thank you and Moed Tov!

The hot plate is also ok

Thank you!