what is the mod to harvest with the right mouse button?
Take a look at HungerOverhaul:
Requires AppleCore: https://www.curseforge.com/minecraft/mc-mods/applecore/files/all?filter-game-version=2020709689:4449
Those have a bunch of extra effects, but here are a couple of other mods to consider:
(yes, it's mainly known as the library for EnderIO, but I know from personal experience that it includes an option for this)