Tofu is made from soybeans, which are not toxic to cats, but they are not a natural part of a cat's diet.
Cats are obligate carnivores and require nutrients that are primarily found in animal products.
Tofu may cause digestive issues in some cats, including gas, diarrhea, or upset stomach.
Suggestions
If you decide to give your cat tofu, do so in very small amounts and only occasionally.
Monitor your cat for any signs of digestive distress.
Always consult with your veterinarian before introducing any new foods into your cat's diet.
Note: even if labeled as safe, any food can potentially cause allergies. When introducing a new food, please feed a small amount and observe your cat for any allergic reactions.