Some drugs (medicine but also recreational) are legal in some countries to just buy anywhere and not in others, as are some type of explosives. Is Facebook bann

Some drugs (medicine but also recreational) are legal in some countries to just buy anywhere and not in others, as are some type of explosives. Is Facebook banning those outright or actually checking per country what is allowed and what is not? It's a question, I do not use Facebook... If banned outright, is that not the same thing but the other way?