If you are referring to the academic or critical "essay" regarding this imagery, here are the core themes usually explored: The "Lion Couch" and the Bull Symbolism
There are popular videos showing the construction of unique furniture, such as an Incredible DIY Bull Sculpture Sofa , where the "essay" is the visual narrative of the build process itself. Bull couch.mp4
The use of a bull or lion for the couch represents regal power and the protection of the deceased during their transition to the afterlife. If you are referring to the academic or