I have a homebrew monk subclass which has 3 subtypes that decide the path the character's features will go but i cant seem to find where i need to go or how to edit it to add the subtype. 

i realized that it seems all subtypes are tied to the true class not the subclasses but i still have no option to edit or add them to make this function. curious if there is one and i'm missing it  or if it just hasn't been implemented as an option for homebrewing.

You need to look into Optionsattached to subclass features. There’s a full walkthrough on how to properly set up Options in the Homebrew Subclasses & Species FAQ #1: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq).

Thank you, i'll read up and see if i can figure it out

If you need more help don’t hesitate to ask.