Describe the solution you'd like

I would love it if stained glass from this mod got the forge:glass/colored item tag and if each colour got the forge:glass/(specific colour) item tags.

I cannot find any reference to a forge:glass/colored tag. There are the forge:glass/colorless and forge:stained_glass tags which the glass is already added to.

if each colour got the forge:glass/(specific colour) item tags.

Not sure how, but I just completely missed these tags. I don't remember ever even seeing these tags, but apparently they've been there since 1.14.

I've added the glass blocks and items to the forge:glass/color tags now in Connected Glass version 1.1.12.
Thank you for reporting the issue!