There are cases where typesetting is just described as “set”. There may be a clue in the name of the company (“Rowland Phototypesetting”) but that isn’t an indication of the process for sure. I used to go to a school named a “Grammar School”, but it wasn’t one. Just the name remained.
I don’t know much about typesetting, it has to be said.
Perhaps another case for having a description field against a Credit attribution?
I like it either as simple as possible or as complicated as we can get. In this case, I’d prefer the simple way with just typesetting, as I assume there are not diffenrent ways of typeset used on one item. It also makes it easier when translating from other languages. Just recently I found a credit for “Belichtung” in a book, did some research and found out: it’s translation varies, depending on the method used. On older books, it would refer to photoset/ phototypeset (literally Fotosatz, which is also a commonly used credit), on newer items it would more likely be “Prepress” (we do have “Scanning/Prepress” as an option on credits).
So I’m perfectly fine with using “Typeset by” for any kind of typeset.