Are you sure that is what you are asking for ??
Unless I'm missing something, that is NOT X/Y labeling. When you have TWO (2) amp blocks in a PRESET, those are actually AMP1 and AMP2.. not X/Y.
X and Y occur within the AMP block.
If you took that idea and applied it so that 1 and 2 are displayed on each Amp block, then applied (for consistency) to all the other blocks (cab, delay, etc.) you'd have a mess of numbers all over your preset - as some blocks can have up to 4 in a preset (and X/Y within each).