I am currently playing on the 1.12.2 version and wanted to add multiple types of hordes
from what i know this is only possible on later versions? or did i miss something in the wiki
i want to add multiple hordes and spawn chance of said hordes with the config file. is this possible with 1.12.2
please tell me how to if possible.
yours truly
imadethisaccformodadvice.

No it is not currently possible, and most likely won't be as it relies on datapack features which aren't in 1.12.