Below is a link to the Prop 65 listed chemicals. Many chemicals on the list are naturally occurring and existed before the mankind even knew what a chemical was. Others are bad, very bad.
https://oehha.ca.gov/media/downloads/proposition-65//p65chemicalslistsinglelisttable2021p.pdf
Some common cooking oils are listed:
Emissions from high-temperature
unrefined rapeseed oil
cancer
That is canola oil.
Most lawyers in the field will tell you to put a prop 65 label on any manufactured item that may find it’s way into Kalifornia. Like everything else in Kalifornia this list is heavily influenced by politics and legal actions.