Could you add a way for modded trees ( ex. Croptopia Trees ) to chop them leaves as well?

Version 1.18.1

The reason why this doesn't work out-of-the-box right now is that the Croptopia leaves don't inherit from normal Minecraft leaves: https://github.com/ExcessiveAmountsOfZombies/Croptopia/blob/master/fabric/src/main/java/me/thonk/croptopia/blocks/LeafCropBlock.java

I will try adding a conditional mixin target for Croptopia leaves to include them. However, the randomTick I hook into to detect leaf decay is also used to grow the "crop" part of the leaf block so I need to be careful to not introduce an exploit to instantly grow crops.

KK sounds good, maybe Croptopia Developer could help

The latest release of fabric-tree-chopper should support Croptopia. Curseforge approved it a few hours ago FYI.