Yes, pyramids do have secret rooms. Recent research confirms the existence of previously undiscovered chambers within at least one pyramid.
Researchers have used advanced technologies like Lidar to map the interiors of pyramids, revealing hidden spaces. One such discovery was made in a badly damaged pyramid where an Egyptologist had found a passageway almost 200 years prior. Full excavation was challenging due to the pyramid's condition, but Lidar technology allowed researchers to uncover previously hidden rooms. This supports the notion that pyramids can contain concealed chambers not immediately apparent through traditional exploration methods.