Loads of pop songs from the 60s and early 70s lend themselves to the folk style, simply because for some years folk and pop overlapped: folk became almost mainstream, and was not regarded as a niche, minority taste. As the 70s progressed, the genres diverged and pop became more synthetic, with studio-produced sounds that couldn't easily be reproduced in performance without a lot of electronic razzamatazz. I could give examples but there are hundreds. When my daughters, in the 1980s, first heard the Beatles, they thought they sounded more like folk than pop.

In recent years there's been a bit of a swing back to a folky, acoustic sound, with songs that can be picked up and sung by a single guitarist or ukulele player. I am not well up in modern pop, but try songs by Ed Sheeran, Passenger, George Ezra, Jamie Lawson, Fleet Foxes, etc.