Is 猪肉饭 the actual name of a specific Chinese dish or is it merely a description of any pork-and-rice meal? I know there's a dish named luroufan but in another forum (Duolingo) there's mention of "zhuroufan".

So obviously zhurou is pork and fan is rice but can also I suppose just mean "meal".

What I'm not sure about is whether this refers to a specific dish in Chinese as the names of Chinese dishes are very often quite concise or idiomatic anyway.
There is no such word, at least few people say it, in Taiwan. However, we might call a bowl of rice and some slices of roasted pork as "燒(roasted)肉飯"、"燒肉丼(a kind of Japanese famous dishes)".