idea because of unique sounds

Hi guys. I don't know if anyone else has already brought this up. But maybe it would be a good idea to have the option to upload unique sound files when making a game, for example, let's say there is a nation that has a unique anthem, or an in-game band and in order to deepen and immerse the game, a completely unique piece of music, or even just a small detail so that players can better identify with it. either within the game or at a lore level. I think this would deepen the game experience.