The phrase "more beneath" can be substituted with various synonyms that evoke a sense of deeper meaning or hidden layers. You can use the words "buried beneath" or "hidden beneath" to convey the idea that there is something hidden beneath the surface that needs to be uncovered. "Further below" or "deeper down" can emphasize the idea that there are more profound levels that need to be explored. "Less evident" or "less apparent" can also be used as synonyms to suggest that there are aspects that are not immediately visible or obvious. Whatever synonym you choose, it will help you convey the essence of uncovering something that lies beneath the surface.