《牛津》对名词apology对释义如下：

[countable, uncountable] apology (to somebody) (for something)： a word or statement saying sorry for something that has been done wrong or that causes a problem

可以看出，to和for是和apology搭配的介词。也就是说to和for介词短语都是修饰apology的。

网友的二个句子中的介词短语都是定语，不是状语。