it actually depends on the process of making the dish. Char is fry, means during the frying process only oil is involved. After frying, you can put whatever banjir sos you want to the fried dish.

But afaik, malay char koay teow is the kuah is also fried with the koay teow till it is soggy. Compare the sogginess of hokkien char and malay char koay teow