i tried things when i then realized that among all the crop that exist on vanilla, you cant use bamboo??
tried sand, dirt, even gravel, nope, it didnt do anything

Bamboo was intentionally excluded but was recently added to the 1.15.2 beta.

Bamboo was intentionally excluded but was recently added to the 1.15.2 beta.

"BotanyPots-1.15.2-2.0.17.jar" ?

Yes that is the correct version. It should work on any sand or dirt soil.