Just as the title says they don't work with each other mouse wheelie is the only one that works.

I just tried it on Fabric 1.19.4 and it does work for me, can you please give more context.

Well I made a modpack for 1.19.4 fabric with a bunch of mods and while working on it i put smooth swapping in the mods folder but it didn't work with mouse wheelie mod. It only worked when mouse wheelie was removed

Very strange, does the game even start if you have both mods added?
If so when does it crash? And if not, whats the error message when fabric tries to launch?