My gut is that this is where it should shine, oddly. The appeal of literate programming is that you can reflow the code to how you want to explain it. As such, if you had to add a bit of code in several places for a reason that you can explain in a narrative, then literate programming should help.

I say oddly, as I don't think I've seen it done for common web apps. I suspect that is largely because frameworks have not been a stable foundation to build on in a long time?

I can't help but think the old templates of old were a hint in how it would have worked fine? Have a section of the literate code that outlines the general template of a file, and where the old "your code goes here" comments used to denote where you add your logic, is instead another section that you can discuss on its own. (Anyone else remember those templates? Were common in app builders, if I recall correctly.)