Does this mod work with the iron chest mod. I am tring it and cant get it to work. if it doesnt it, is there any future plans for it to work with it?

It does work
I used it before like 1 or 2 years ago.
However, I use this mod
https://modrinth.com/mod/reinforced-chests

Yes it does. Chests from both Iron chest and Reinforced chest (mentioned by the first reply) mods have inventories that are recognized by the inventory connector.

If it works with vanilla hoppers it should work.