Sneak /w out descending on Playstation 4

On Playstation 4 the controls for "sneak" and "fly downward" are combined. It would be better for them to register separately yet allow overlapping so that players can choose whether or not to use the same button for both. I imagine any technical player would prefer them to be separate though, which is currently not possible for controllers. (btw if everything I just said is wrong, pls tell me how to do it lol). The problem here is when trying to place a block onto an interactive block (like a hopper or command block) while flying, the need for which is frequent. Players should be able to sneak in the air without descending downward.