You know, you’d think that, especially seeing the global orientation of the spine when people are “hunching” at a desk. Really though, the hunching seems to happen when one leans forward to get closer to the screen, keyboard, etc. That shifting of the center of gravity forward can move the entire ribcage forward as well. That results in anterior pelvic tilt, and thus lumbar lordosis. At least that’s my experience.
People with swayback posture will have thoracic kyphosis and posterior pelvic tilt, thus having a “flatter,” more “flexed” lumbar spine. But swayback is much less common that people stuck in anterior pelvic tilt and thoracic kyphosis.