There is no such thing as “food incompatibility” in either nutrition or food safety theory. There is no such thing as what you can’t eat with kelp, but those who are allergic to kelp should not eat it.
Kelp is rich in nutrients, every 100g of kelp contains more than 90g of water, calcium 46mg, protein 1.2g, carbohydrates 2.1g, iodine 923μg, as well as vitamin A, vitamin E, calcium and other nutrients. The iodine content in kelp alone is high and can be a good source of iodine.
Don’t worry about what you can’t eat with kelp, you can usually eat with it as long as you are not allergic, but you should also pay attention to moderate consumption and balanced nutrition.