There is no authoritative evidence to prove that mint causes cancer.
Mint is a common spice, and can be used with many beverages, food, pleasant aroma can promote the human appetite, there is no authoritative evidence or scientific research to prove that mint carcinogenic.
There is a component in mint called menthol, which is a medicinal ingredient, mainly used for localized pain and itch relief, as well as the treatment of headaches, dizziness, and mosquito bites. Side effects can cause localized irritation, and menthol is contraindicated in infants and children.
Menthol can form benzo(a)pyrene when burned at high temperatures, which is a carcinogen, but this does not mean that mint is directly carcinogenic, as long as you avoid high temperature burning of mint, there is no risk of cancer.
Menthol can be consumed in moderation, but not in excess, excessive amounts are likely to cause gastrointestinal adverse reactions and other side effects.