Farms should farm all the plants. At the moment they don't farm those:
Honestly good idea.
Maybe even trees. Or you could create a new plugin for that (Minions? https://www.spigotmc.org/resources/minions-upgrades-customise-minion-skins-actions-animations-robots-1-8-1-14-support.59972/) and implement the tree thing and this: https://feedback.songoda.com/d/64-dispensers-should-get-more-features
I like the idea of a minions plugin. Maybe make it so you can customize the item for a farm, like instead of an end rod/torch, you can set it to an armor stand with the data for the head, armor, etc.
This should've been added when it was first developed tbh
for the minions plugin suggestion, look here: https://feedback.songoda.com/d/367-minions-plugin :)
Also cocoa beans / vines
and the new nether plants in 1.16 :)
addChorus fruit and flower farming ability