Ask friends with Islamic culture. In Islam, is there a difference between believers in the strict sense and ordinary believers?

No, Islam doesn't call itself a monk. The imam in the mosque is just an elder who specializes in religious management and education. He can get married and have children, unlike Buddhist monks and Catholic monks. However, there are still levels of belief. Those who keep well and know the general teachings are respected, and those who don't keep well are also discussed, just like our attitude towards daily morality. (The above is only the situation in China. In some Middle Eastern countries, the combination of belief and feudal paternalism has become a tool to enslave people. This is another matter. )