If it’s stitched panoramas I’d go back to the source images to attempt a 3D model. Each panorama is only equivalent to 1 camera (all images from the same viewpoint) so you’d need a few panoramas at the very least. The distance between panoramas is usually too high in your average panorama tour. A few people have tried to do both and noted that they had to shoot 3-4x as many panoramas as they normally would for pano tour.