My experience is the same. I replaced Pop with Arch running a pretty low-resource desktop setup (i3 and generally lightweight programs) and I can get roughly 10 hours with very heavy usage: Firefox with a handful of windows/dozens and dozens of tabs open, Docker, Spotify, etc.

Not terribly impressive compared to something like the newer Apple silicon MacBooks but also not terribly offensive considering I don't often work far from an available power source for super long stretches.