Cat food doesn't need to be thrown away if it hasn't directly come into contact with the cat. As for supplies, you can disinfect them with a highly effective disinfectant for feline panleukopenia and then continue to use them. I'll share some methods for disinfecting feline panleukopenia, hoping they will be helpful to you.
Feline panleukopenia, also known as feline infectious enteritis, is an acute, highly contagious disease in cats. It is highly contagious, has a rapid onset, and can infect healthy cats in a short period. Furthermore, the feline panleukopenia virus requires highly effective disinfectants to kill it. 
If your cat has feline panleukopenia, you can thoroughly disinfect its belongings twice with a high-level, food-grade, non-irritating LW Light & Wind pet disinfectant. Also, thoroughly disinfect the cat's living environment three times using a misting system (mist disinfection kills bacteria in the air). This treatment will ensure the complete eradication of the feline panleukopenia virus from the belongings and the surrounding environment. When choosing a disinfectant, consider the cat's safety and avoid causing secondary harm. Choose one with no irritating odor, as strong odors can severely damage a cat's sense of smell. (A cat's sense of smell is 100 times more sensitive than a human's, and they use their nose to identify food and perceive temperature). The disinfectant should be residue-free and non-irritating to the skin; irritating disinfectants can cause skin diseases in cats.
